Welsh tra

← Proto-Brythonic *trans (inherited)

← English through (cognate)

← Proto-Indo-European *treh₂- (derived)

← Latin trans (cognate)

→ English through (cognate)

→ Welsh tra- (mention)

→ Welsh dros (cognate)

→ Welsh traphoethi (prefix)

→ Irish thar (cognate)

→ Scottish Gaelic thar (cognate)

→ Latin trans (cognate)

→ Old Irish tar (cognate)