Irish os

← Proto-Celtic *uxsū (inherited)

← Proto-Celtic *ouxsos (inherited)

← Proto-Indo-European *uksḗn (inherited)

← Proto-Indo-European *upo (derived)

← Old Irish oss (inherited)

← Old Irish úas (inherited)

← Old Irish ós (mention)

→ English Oscar (mention)

→ English Ossian (mention)

→ Irish Oisín (affix)

→ Irish oisín (affix)

→ Irish oiseoil (affix)

→ Irish os- (mention)

→ Irish osbhuí (affix)

→ Irish osoighreach (prefix)

→ Irish osamharc (prefix)

→ Irish os-mhise (prefix)

→ Irish osordaithe (prefix)

→ Irish osduine (prefix)

→ Irish osduánach (prefix)