Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Old Irish com-
← Proto-Celtic *kom- (inherited)

→ Gaulish con- (cognate)
→ Irish cumas (mention)
→ Irish comh- (inherited)
→ Irish cobhsaí (affix)
→ Irish chomh (inherited)
→ Irish comórtas (mention)
→ Scottish Gaelic co- (inherited)
→ Scottish Gaelic teagaisg (affix)
→ Scottish Gaelic cho (link)
→ Scottish Gaelic cogais (mention)
→ Scottish Gaelic cogais (mention)
→ Manx co- (inherited)
→ Manx caggey (mention)
→ Manx cagg (mention)
→ Old Irish consecha (affix)
→ Old Irish cocubus (mention)
→ Old Irish adcomla (affix)
→ Old Irish adcosnai (affix)
→ Old Irish adcota (affix)
→ Old Irish comarbbae (affix)
→ Old Irish contuili (affix)
→ Old Irish adfét (mention)
→ Old Irish adfét (mention)
→ Old Irish conbeir (affix)
→ Old Irish conceil (affix)
→ Old Irish condieig (affix)
→ Old Irish congaib (affix)
→ Old Irish congair (affix)
→ Old Irish congní (affix)
→ Old Irish conmeil (affix)
→ Old Irish conmesca (affix)
→ Old Irish conricc (affix)
→ Old Irish conscara (affix)
→ Old Irish contibi (affix)
→ Old Irish téit (affix)
→ Old Irish cotarsnae (affix)
→ Old Irish frecndairc (affix)
→ Old Irish cosmail (affix)
→ Old Irish comsuidigud (affix)
→ Old Irish conboing (affix)