Welsh rhyd

← Breton red (cognate)

← Proto-Brythonic *rrɨd (derived)

← Proto-Celtic *ɸritus (derived)

← English ford (cognate)

← Proto-Indo-European *pértus (inherited)

← Cornish rys (cognate)

← Latin portus (cognate)

← Old Welsh rit (inherited)

→ English Penrith (cognate)

→ Welsh Rhydychen (affix)