Middle Irish lem

← Proto-Celtic *lēmos (inherited)

← Proto-Celtic *limos (mention)

← Welsh llwyf (cognate)

← Proto-Indo-European *h₁élem (inherited)

← Proto-Indo-European *h₃lemH- (derived)

← Latin ulmus (cognate)

→ Irish leamh (inherited)

→ Irish leamhán (mention)

→ Irish leamhnacht (mention)

→ Scottish Gaelic leamh (inherited)

→ Scottish Gaelic leamhan (mention)

→ Manx lhiouan (mention)

→ Middle Irish lemán (suffix)