TheReginarids (orRegnarids,Regniers,Reiniers, etc.)^[1] were a family of magnates inLower Lotharingia during theCarolingian andOttonian period. Their modern name is derived from the personal name which many members of the family bore, and which is seen as aLeitname of the family. At least twoDukes of Lotharingia in the 10th century belonged to this family. After a period of exile and rebellion, the two brothers who returned to power founded the first dynasties of theCounty of Hainault andCounty of Louvain. The latter were ancestors of theHouse of Brabant,Landgraves and laterDukes of Brabant,Lothier andLimburg. The Reginarid Brabant dynasty ended in 1355, leaving its duchies to theHouse of Luxembourg which in turn left them to theHouse of Valois-Burgundy in 1383. Junior branches of the male line include the medieval male line of the EnglishHouse of Percy,Earls of Northumberland, and the GermanHouse of Hesse which ruled Hesse from 1264 until 1918, included KingFrederick of Sweden and still exists today.

House of Brabant Maison de Brabant House of Hainaut, House of Louvain
Ducalnoble family
Country	Holy Roman Empire  Kingdom of France  Kingdom of England Duchy of Brabant
Earlier spellings	Reginarids
Etymology	Descendant ofReginar
Founded	880; 1145 years ago (880)
Founder	Reginar I, Count of Hainaut
Current head	Donatus, Landgrave of Hesse
Final ruler	Joanna, Duchess of Brabant
Titles	Landgrave/Duke of Brabant Duke of Limburg Duke of Lothier Duke of Lorraine Margrave of Antwerp Count of Louvain Count of Hainaut
Estate(s)	Coudenberg
Dissolution	1406 (1406) (senior branch)
Cadet branches	House of Hesse House of Percy

The first probable ancestor known with any confidence isGilbert, Count of the Maasgau (mentioned in 841) who served KingLothair I, but defected to Lothair's half-brotherCharles the Bald during thecivil war of 840–843. In 846 Gilbert abducted an unnamed daughter of Lothair and married her in an attempt to force Lothair to reinstate him.Reginar, Duke of Lorraine (c. 850–916) is believed to be Gilbert's son. Following the death ofCharles the Fat, the Reginarids began a long fight with theConradines for supremacy in Lotharingia.^[2] When they triumphed, in 910, it was in electingCharles the Simple as king. It was the combined forces ofBruno I of Lorraine and theCarolingians ofWest Francia that finally broke the Reginarids' hold on power.^[3] In 958,Reginar III had his lands confiscated and redistributed to Gerard, Count of Metz, of theMatfridings, enemies of his family since the reign ofZwentibold.^[4]

The Reginarids supportedLothair of France againstOtto II, but they made a deal with the latter in 978.^[5]

The Reginarids were no longer a unified family by the end of the tenth century.^[6] Their descendants inMons andLouvain continued their spirit of opposition to the king.^[7] The house also produced a queen-consort of England in the form ofAdeliza of Leuven, who marriedHenry I of England.

Dukes of Lorraine

• Reginar (910–915)
• Gilbert (915–939)

Counts of Hainaut

• Reginar I (r. ?-898 and 908–915)
• Reginar II (r. 915-after 932)
• Reginar III (r. before 940–958)
• Reginar IV (r. 973–974)
• Reginar V (r. 1013–1039), acquired the southern part of theBrabant province around 1024
• Herman (r. 1039–1051), marriedRichilda, acquired Valenciennes around 1045 or 1049

Counts of Leuven,Counts of Brussels

• 1003–1015 :Lambert I, was the first Count of Louvain, son ofReginar IIICount of Hainaut
• 1015–1038 :Henry I, (son ofLambert I)
• 1038–1040 :Otto
• 1040–1054 :Lambert II, (son ofLambert I)
• 1054–1079 :Henry II, (son ofLambert II)
• 1079–1086 :Henry III, (son ofHenry II)

Dukes of Lower Lorraine

• Godfrey I of Leuven (1106–1129) (also known as Godfrey V), brother ofHenry III, Count of Louvain
• Godfrey II of Leuven (1139–1142) (also known as Godfrey VI)
• Godfrey III of Leuven (1142–1190) (also known as Godfrey VII)

Passes toHenry I, Duke of Brabant (1190–1235), see below:Duke of Brabant

Counts of Leuven,Counts of Brussels andLandgraves of Brabant:

• Henry III (1085/1086–1095); alreadyCount of Leuven and Brussels from 1078.
• Godfrey I (from 1095)

Counts of Leuven,Counts of Brussels,Landgraves of Brabant,Margrave of Antwerp andDukes of Lower-Lorraine:

• Godfrey I (1106–1139) appointed as Duke in 1106
• Godfrey II (1139–1142)
• Godfrey III (1142–1190)

Dukes of Brabant andDukes of Lothier:

• Henry I (1190–1235); already Duke of Brabant from 1183/1184
• Henry II (1235–1248)
• Henry III (1248–1261), his younger half brotherHenry I, Landgrave of Hesse inheritedHesse from his mother and became the founder of theHouse of Hesse
• Henry IV (1261–1267)

Dukes of Brabant,Dukes of Lothier andDukes of Limburg:

• John I (1267–1294)
• John II (1294–1312)
• John III (1312–1355)
• Joanna (1355–1406), marriedWenceslaus I, Duke of Luxembourg

• Reuter, Timothy.Germany in the Early Middle Ages 800–1056. New York: Longman, 1991.
• Family tree of Reginars and Balderics: KUPPER, Jean-Louis. Annexe II. Les Régnier et les Balderic In: Liège et l’Église impériale aux XIe-XIIe siècles [en línea]. Liége: Presses universitaires de Liège, 1981 (generado el 02 julio 2017). Disponible en Internet: <http://books.openedition.org/pulg/1472>.ISBN 9782821828681. DOI: 10.4000/books.pulg.1472.