Welsh rhudd

← Proto-Brythonic *rrʉð (inherited)

← Proto-Celtic *roudos (inherited)

← Proto-Indo-European *h₁rewdʰ- (inherited)

→ English red (cognate)

→ Welsh llofrudd (affix)

→ Welsh rhuddwyn (compound)

→ Irish rua (cognate)

→ Scottish Gaelic ruadh (cognate)

→ Manx ruy (cognate)

→ Old Irish rúad (cognate)