Old Irish serb

← Proto-Celtic *swerwos (inherited)

← Proto-Celtic *serwā (inherited)

← Welsh chwerw (cognate)

← Proto-Indo-European *swer- (root)

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

← Proto-Indo-European *ser- (derived)

← Latin servus (cognate)

← Latin servus (borrowed)

→ Irish searbh (inherited)

→ Scottish Gaelic searbh (inherited)