Breton lestr

← Proto-Brythonic *llestr (inherited)

← Proto-Celtic *lestrom (inherited)

← Welsh llestr (cognate)

← Irish leastar (cognate)

← Old Breton lestr (inherited)

→ Breton aerlestr (compound)

→ Breton lestrañ (suffix)

→ Breton dilestrañ (affix)

→ Welsh llestr (cognate)

→ Irish leastar (cognate)