Appendix:Welsh numbers

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Number	Cardinal	Ordinal	Ordinal abbreviation	Adverbial	Multiplier	Wikipedia link
0	sero	serofed	0fed			sero
1	un	cyntaf	1af	unwaith		un
2	masculine:dau feminine:dwy	ail,eilfed	2il,2fed	dwywaith	dwbl	dau
3	masculine:tri feminine:tair	masculine:trydydd feminine:trydedd	masculine:3ydd feminine:3edd	teirgwaith	triphlyg	tri
4	masculine:pedwar feminine:pedair	masculine:pedwerydd feminine:pedwaredd	masculine:4ydd feminine:4edd		pedwarplyg	pedwar
5	pump,(before nouns)pum	pumed	5ed			pump
6	chwech,(before nouns)chwe	chweched	6ed			chwech
7	saith	seithfed	7fed			saith
8	wyth	wythfed	8fed			wyth
9	naw	nawfed	9fed			naw
10	deg,(before a nasal or optionally a vowel)deng	degfed	10fed			deg
11	decimal:un deg un vigesimal:un ar ddeg	(default):unfed ar ddeg vigesimal:(non-standard)unarddegfed decimal:un deg unfed	11eg			un deg un
12	masculine / decimal:un deg dau feminine / decimal:un deg dwy vigesimal:deuddeg,(before a nasal or optionally a vowel)deuddeng	deuddegfed	12fed			un deg dau
13	masculine / decimal:un deg tri feminine / decimal:un deg tair masculine / vigesimal:tri ar ddeg feminine / vigesimal:tair ar ddeg	masculine:trydydd ar ddeg feminine:trydedd ar ddeg vigesimal:(non-standard)triarddegfed	13eg			un deg tri
14	masculine / decimal:un deg pedwar feminine / decimal:un deg pedair masculine / vigesimal:pedwar ar ddeg feminine / vigesimal:pedair ar ddeg	masculine:pedwerydd ar ddeg feminine:pedwaredd ar ddeg	14eg			un deg pedwar
15	decimal:un deg pump vigesimal:pymtheg	pymthegfed	15fed			un deg pump
16	decimal:un deg chwech vigesimal:un ar bymtheg	(default):unfed ar bymtheg vigesimal:(non-standard)unarbymthegfed	16eg			un deg chwech
17	decimal:un deg saith masculine / vigesimal:dau ar bymtheg feminine / vigesimal:dwy ar bymtheg	(default):ail ar bymtheg,eilfed ar bymtheg masculine / vigesimal:ddeufed ar bymtheg,deufed ar bymtheg feminine / vigesimal:ddwyfed ar bymtheg,dwyfed ar bymtheg	17eg			un deg saith
18	decimal:un deg wyth vigesimal:deunaw feminine / vigesimal:tair ar bymtheg,ugain namyn dwy	(default):deunawfed masculine / vigesimal:trydydd ar bymtheg	18fed			un deg wyth
19	decimal:un deg naw masculine / vigesimal:pedwar ar bymtheg feminine / vigesimal:pedair ar bymtheg	masculine:pedwerydd ar bymtheg feminine:pedwaredd ar bymtheg	19eg			un deg naw
20	decimal:dau ddeg,(optionally before a nasal or vowel)dau ddeng vigesimal:ugain	ugeinfed	20fed			dau ddeg
21	vigesimal:un ar hugain decimal:dau ddeg un	unfed ar hugain	21ain
22	masculine / vigesimal:dau ar hugain feminine / vigesimal:dwy ar hugain masculine / decimal:dau ddeg dau feminine / decimal:dau ddeg dwy	(default):ail ar hugain masculine / vigesimal:ddeufed ar hugain,deufed ar hugain feminine / vigesimal:ddwyfed ar hugain,dwyfed ar hugain	22ain
23	masculine / vigesimal:tri ar hugain feminine / vigesimal:tair ar hugain masculine / decimal:dau ddeg tri feminine / decimal:dau ddeg tair	masculine:trydydd ar hugain feminine:trydedd ar hugain	23ain
24	masculine / vigesimal:pedwar ar hugain feminine / vigesimal:pedair ar hugain masculine / decimal:dau ddeg pedwar feminine / decimal:dau ddeg pedair	masculine:pedwerydd ar hugain feminine:pedwaredd ar hugain	24ain
25	vigesimal:pump ar hugain,(before nouns)pum ar hugain decimal:dau ddeg pump,(before nouns)dau ddeg pum	pumed ar hugain	25ain
26	vigesimal:chwech ar hugain,(before nouns)chwe ar hugain decimal:dau ddeg chwech,(before nouns)dau ddeg chwe	chweched ar hugain	26ain
27	vigesimal:saith ar hugain decimal:dau ddeg saith	seithfed ar hugain	27ain
28	vigesimal:wyth ar hugain decimal:dau ddeg wyth	wythfed ar hugain	28ain
29	vigesimal:naw ar hugain decimal:dau ddeg naw	nawfed ar hugain	29ain
30	decimal:tri deg,(optionally before a nasal or vowel)tri deng vigesimal:deg ar hugain	degfed ar hugain	30ain
31	vigesimal:un ar ddeg ar hugain decimal:tri deg un	unfed ar ddeg ar hugain	31ain
32	vigesimal:deuddeg ar hugain,(before a nasal or optionally a vowel)deuddeng ar hugain masculine / decimal:tri deg dau feminine / decimal:tri deg dwy	deuddegfed ar hugain	32ain
33	masculine / vigesimal:tri ar ddeg ar hugain feminine / vigesimal:tair ar ddeg ar hugain masculine / decimal:tri deg tri feminine / decimal:tri deg tair	masculine:trydydd ar ddeg ar hugain feminine:trydedd ar ddeg ar hugain	33ain
34	masculine / vigesimal:pedwar ar ddeg ar hugain feminine / vigesimal:pedair ar ddeg ar hugain masculine / decimal:tri deg pedwar feminine / decimal:tri deg pedair	masculine:pedwerydd ar ddeg ar hugain feminine:pedwaredd ar ddeg ar hugain	34ain
35	vigesimal:pymtheg ar hugain decimal:tri deg pump,(before nouns)tri deg pum	pymthegfed ar hugain	35ain
36	vigesimal:un ar bymtheg ar hugain decimal:tri deg chwech,(before nouns)tri deg chwe	unfed ar bymtheg ar hugain	36ain
37	masculine / vigesimal:dau ar bymtheg ar hugain feminine / vigesimal:dwy ar bymtheg ar hugain decimal:tri deg saith	ail ar bymtheg ar hugain	37ain
38	vigesimal:deunaw ar hugain decimal:tri deg wyth	deunawfed ar hugain	38ain
39	masculine / vigesimal:pedwar ar bymtheg ar hugain feminine / vigesimal:pedair ar bymtheg ar hugain decimal:tri deg naw	masculine:pedwerydd ar bymtheg ar hugain feminine:pedwaredd ar bymtheg ar hugain	39ain
40	decimal:pedwar deg,(optionally before a nasal or vowel)pedwar deng vigesimal:deugain	deugeinfed	40fed
41	vigesimal:deugain ac un decimal:pedwar deg un	deugain ac unfed	41fed
42	masculine / vigesimal:deugain ac dau feminine / vigesimal:deugain ac dwy masculine / decimal:pedwar deg dau feminine / decimal:pedwar deg dwy	deugain ac ail	42il
43	masculine / vigesimal:deugain ac tri,tri a deugain feminine / vigesimal:deugain ac tair masculine / decimal:pedwar deg tri feminine / decimal:pedwar deg tair	masculine:deugain ac trydydd feminine:deugain ac trydedd	masculine:43ydd feminine:43edd
44	masculine / vigesimal:deugain ac pedwar feminine / vigesimal:deugain ac pedair masculine / decimal:pedwar deg pedwar feminine / decimal:pedwar deg pedair	masculine:deugain ac pedwerydd feminine:deugain ac pedwaredd	masculine:44ydd feminine:44edd
45	vigesimal:deugain ac pump,(before nouns)deugain ac pum decimal:pedwar deg pump,(before nouns)pedwar deg pum	deugain ac pumed	45ed
46	vigesimal:deugain ac chwech,(before nouns)deugain ac chwe decimal:pedwar deg chwech,(before nouns)pedwar deg chwe	deugain ac chweched	46ed
47	vigesimal:deugain ac saith decimal:pedwar deg saith	deugain ac seithfed	47fed
48	vigesimal:deugain ac wyth,wyth ar ddeugain decimal:pedwar deg wyth	deugain ac wythfed	48fed
49	vigesimal:deugain ac naw decimal:pedwar deg naw	deugain ac nawfed	49fed
50	decimal:pum deg,(optionally before a nasal or vowel)pum deng vigesimal:hanner cant	hanner canfed	50fed
51	vigesimal:hanner cant ac un decimal:pum deg un	hanner cant ac unfed	51fed
52	masculine / vigesimal:hanner cant ac dau feminine / vigesimal:hanner cant ac dwy masculine / decimal:pum deg dau feminine / decimal:pum deg dwy	hanner cant ac ail	52il
53	masculine / vigesimal:hanner cant ac tri feminine / vigesimal:hanner cant ac tair masculine / decimal:pum deg tri feminine / decimal:pum deg tair	masculine:hanner cant ac trydydd feminine:hanner cant ac trydedd	masculine:53ydd feminine:53edd
54	masculine / vigesimal:hanner cant ac pedwar feminine / vigesimal:hanner cant ac pedair masculine / decimal:pum deg pedwar feminine / decimal:pum deg pedair	masculine:hanner cant ac pedwerydd feminine:hanner cant ac pedwaredd	masculine:54ydd feminine:54edd
55	vigesimal:hanner cant ac pump,(before nouns)hanner cant ac pum decimal:pum deg pump,(before nouns)pum deg pum	hanner cant ac pumed	55ed
56	vigesimal:hanner cant ac chwech,(before nouns)hanner cant ac chwe decimal:pum deg chwech,(before nouns)pum deg chwe	hanner cant ac chweched	56ed
57	vigesimal:hanner cant ac saith decimal:pum deg saith	hanner cant ac seithfed	57fed
58	vigesimal:hanner cant ac wyth decimal:pum deg wyth	hanner cant ac wythfed	58fed
59	vigesimal:hanner cant ac naw decimal:pum deg naw	hanner cant ac nawfed	59fed
60	decimal:chwe deg,(optionally before a nasal or vowel)chwe deng vigesimal:trigain	trigeinfed	60fed
61	vigesimal:trigain ac un decimal:chwe deg un	trigain ac unfed	61fed
62	masculine / vigesimal:trigain ac dau feminine / vigesimal:trigain ac dwy masculine / decimal:chwe deg dau feminine / decimal:chwe deg dwy	trigain ac ail	62il
63	masculine / vigesimal:trigain ac tri feminine / vigesimal:trigain ac tair masculine / decimal:chwe deg tri feminine / decimal:chwe deg tair	masculine:trigain ac trydydd feminine:trigain ac trydedd	masculine:63ydd feminine:63edd
64	masculine / vigesimal:trigain ac pedwar feminine / vigesimal:trigain ac pedair masculine / decimal:chwe deg pedwar feminine / decimal:chwe deg pedair	masculine:trigain ac pedwerydd feminine:trigain ac pedwaredd	masculine:64ydd feminine:64edd
65	vigesimal:trigain ac pump,(before nouns)trigain ac pum decimal:chwe deg pump,(before nouns)chwe deg pum	trigain ac pumed	65ed
66	vigesimal:trigain ac chwech,(before nouns)trigain ac chwe decimal:chwe deg chwech,(before nouns)chwe deg chwe	trigain ac chweched	66ed
67	vigesimal:trigain ac saith decimal:chwe deg saith	trigain ac seithfed	67fed
68	vigesimal:trigain ac wyth decimal:chwe deg wyth	trigain ac wythfed	68fed
69	vigesimal:trigain ac naw decimal:chwe deg naw	trigain ac nawfed	69fed
70	decimal:saith deg,(optionally before a nasal or vowel)saith deng vigesimal:deg a thrigain	degfed a thrigain	70ain
71	vigesimal:un ar ddeg a thrigain decimal:saith deg un	unfed ar ddeg a thrigain	71ain
72	vigesimal:deuddeg a thrigain,(before a nasal or optionally a vowel)deuddeng a thrigain masculine / decimal:saith deg dau feminine / decimal:saith deg dwy	deuddegfed a thrigain	72ain
73	masculine / vigesimal:tri ar ddeg a thrigain feminine / vigesimal:tair ar ddeg a thrigain masculine / decimal:saith deg tri feminine / decimal:saith deg tair	masculine:trydydd ar ddeg a thrigain feminine:trydedd ar ddeg a thrigain	73ain
74	masculine / vigesimal:pedwar ar ddeg a thrigain feminine / vigesimal:pedair ar ddeg a thrigain masculine / decimal:saith deg pedwar feminine / decimal:saith deg pedair	masculine:pedwerydd ar ddeg a thrigain feminine:pedwaredd ar ddeg a thrigain	74ain
75	vigesimal:pymtheg a thrigain decimal:saith deg pump,(before nouns)saith deg pum	pymthegfed a thrigain	75ain
76	vigesimal:un ar bymtheg a thrigain decimal:saith deg chwech,(before nouns)saith deg chwe	unfed ar bymtheg a thrigain	76ain
77	masculine / vigesimal:dau ar bymtheg a thrigain feminine / vigesimal:dwy ar bymtheg a thrigain decimal:saith deg saith	ail ar bymtheg a thrigain	77ain
78	vigesimal:deunaw a thrigain decimal:saith deg wyth	deunawfed a thrigain	78ain
79	masculine / vigesimal:pedwar ar bymtheg a thrigain feminine / vigesimal:pedair ar bymtheg a thrigain decimal:saith deg naw	masculine:pedwerydd ar bymtheg a thrigain feminine:pedwaredd ar bymtheg a thrigain	79ain
80	decimal:wyth deg,(optionally before a nasal or vowel)wyth deng vigesimal:pedwar ugain	pedwar ugeinfed	80fed
81	vigesimal:pedwar ugain ac un decimal:wyth deg un	pedwar ugain ac unfed	81fed
82	masculine / vigesimal:pedwar ugain ac dau feminine / vigesimal:pedwar ugain ac dwy masculine / decimal:wyth deg dau feminine / decimal:wyth deg dwy	pedwar ugain ac ail	82il
83	masculine / vigesimal:pedwar ugain ac tri feminine / vigesimal:pedwar ugain ac tair masculine / decimal:wyth deg tri feminine / decimal:wyth deg tair	masculine:pedwar ugain ac trydydd feminine:pedwar ugain ac trydedd	masculine:83ydd feminine:83edd
84	masculine / vigesimal:pedwar ugain ac pedwar feminine / vigesimal:pedwar ugain ac pedair masculine / decimal:wyth deg pedwar feminine / decimal:wyth deg pedair	masculine:pedwar ugain ac pedwerydd feminine:pedwar ugain ac pedwaredd	masculine:84ydd feminine:84edd
85	vigesimal:pedwar ugain ac pump,(before nouns)pedwar ugain ac pum decimal:wyth deg pump,(before nouns)wyth deg pum	pedwar ugain ac pumed	85ed
86	vigesimal:pedwar ugain ac chwech,(before nouns)pedwar ugain ac chwe decimal:wyth deg chwech,(before nouns)wyth deg chwe	pedwar ugain ac chweched	86ed
87	vigesimal:pedwar ugain ac saith decimal:wyth deg saith	pedwar ugain ac seithfed	87fed
88	vigesimal:pedwar ugain ac wyth decimal:wyth deg wyth	pedwar ugain ac wythfed	88fed
89	vigesimal:pedwar ugain ac naw decimal:wyth deg naw	pedwar ugain ac nawfed	89fed
90	decimal:naw deg,(optionally before a nasal or vowel)naw deng vigesimal:deg a phedwar ugain	degfed a phedwar ugain	90ain
91	vigesimal:un ar ddeg a phedwar ugain decimal:naw deg un	unfed ar ddeg a phedwar ugain	91ain
92	vigesimal:deuddeg a phedwar ugain,(before a nasal or optionally a vowel)deuddeng a phedwar ugain masculine / decimal:naw deg dau feminine / decimal:naw deg dwy	deuddegfed a phedwar ugain	92ain
93	masculine / vigesimal:tri ar ddeg a phedwar ugain feminine / vigesimal:tair ar ddeg a phedwar ugain masculine / decimal:naw deg tri feminine / decimal:naw deg tair	masculine:trydydd ar ddeg a phedwar ugain feminine:trydedd ar ddeg a phedwar ugain	93ain
94	masculine / vigesimal:pedwar ar ddeg a phedwar ugain feminine / vigesimal:pedair ar ddeg a phedwar ugain masculine / decimal:naw deg pedwar feminine / decimal:naw deg pedair	masculine:pedwerydd ar ddeg a phedwar ugain feminine:pedwaredd ar ddeg a phedwar ugain	94ain
95	vigesimal:pymtheg a phedwar ugain decimal:naw deg pump,(before nouns)naw deg pum	pymthegfed a phedwar ugain	95ain
96	vigesimal:un ar bymtheg a phedwar ugain decimal:naw deg chwech,(before nouns)naw deg chwe	unfed ar bymtheg a phedwar ugain	96ain
97	masculine / vigesimal:dau ar bymtheg a phedwar ugain feminine / vigesimal:dwy ar bymtheg a phedwar ugain decimal:naw deg saith	ail ar bymtheg a phedwar ugain	97ain
98	vigesimal:deunaw a phedwar ugain decimal:naw deg wyth	deunawfed a phedwar ugain	98ain
99	vigesimal:cant namyn un masculine / vigesimal:pedwar ar bymtheg a phedwar ugain feminine / vigesimal:pedair ar bymtheg a phedwar ugain decimal:naw deg naw	(default):canfed namyn un masculine:pedwerydd ar bymtheg a phedwar ugain feminine:pedwaredd ar bymtheg a phedwar ugain	99ain
100	(default):cant,(before nouns)can vigesimal:pum ugain	canfed	100fed
120	(default):cant ac ugain decimal:cant dau ddeg vigesimal:chweugain
200	dau gant	dau ganfed
300	tri chant	tri chanfed
400	pedwar cant	pedwar canfed
500	pum cant	pum canfed
600	chwe chant	chwe chanfed
700	saith cant	saith canfed
800	wyth cant	wyth canfed
900	naw cant	naw canfed
1,000	mil	mil
2,000	dau fil	dau filfed
3,000	tri mil	tri milfed
4,000	pedwar mil	pedwar milfed
5,000	pump mil	pump milfed
6,000	chwech mil	chwech milfed
7,000	saith mil	saith milfed
8,000	wyth mil	wyth milfed
9,000	naw mil	naw milfed
10,000	deg mil,(before a nasal or optionally a vowel)deng mil	deg milfed,(before a nasal or optionally a vowel)deng milfed
20,000	dau ddeg mil	dau ddeg milfed
30,000	tri deg mil	tri deg milfed
40,000	pedwar deg mil	pedwar deg milfed
50,000	pum deg mil	pum deg milfed
60,000	chwe deg mil	chwe deg milfed
70,000	saith deg mil	saith deg milfed
80,000	wyth deg mil	wyth deg milfed
90,000	naw deg mil	naw deg milfed
1,000,000 (10⁶)	miliwn
1,000,000,000 (10⁹)	biliwn

Number

Cardinal

Wikipedia link