FromMiddle Englishbirchen,birken, fromOld Englishbircen,*biercen,beorcen(“made of birch, birchen”), fromProto-Germanic*birkīnaz(“made of birch”), equivalent tobirch +-en. Cognate withScotsbirken,birkin(“birchen”),Dutchberken(“birchen”),Low Germanberken(“birchen”),Germanbirken(“birchen”).
birchen (notcomparable)
Frombirche (fromOld Englishbirce) +-en.
birchen