Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Irish dubh
← Proto-Celtic *dubus (inherited)
← English deaf (cognate)
← Proto-Indo-European *dʰewbʰ- (root)
← Proto-Indo-European *dʰewbʰ- (inherited)
← Old Irish dub (inherited)

→ English Kirwan (mention)
→ English Davenport (mention)
→ English Duff (mention)
→ English Devine (mention)
→ English Dooley (mention)
→ English Dugan (mention)
→ English Dowd (mention)
→ English Doane (mention)
→ English Deegan (mention)
→ English Duffin (mention)
→ English Ducey (mention)
→ English Doheny (mention)
→ English McDuffie (mention)
→ English dullahan (mention)
→ English Deeley (mention)
→ English Devoy (mention)
→ English McAfee (mention)
→ English McNiff (mention)
→ English McAdoo (mention)
→ English Braniff (mention)
→ Irish dúch (affix)
→ Irish dúlamán (mention)
→ Irish uraigh (affix)
→ Irish scothdhubh (prefix)
→ Irish píbdhubh (affix)
→ Irish dubhach (suffix)
→ Irish ceanndubh (prefix)
→ Irish Dubhghall (compound)
→ Irish lionn dubh (compound)
→ Irish duibhéan (affix)
→ Manx Divlyn (mention)