Welsh peth

← Breton pezh (cognate)

← Proto-Brythonic *peθ (inherited)

← Proto-Celtic *kʷezdis (inherited(cy/kw))

← Proto-Celtic *kʷezdis (inherited)

← English piece (cognate)

← Irish cuid (cognate)

← Cornish pyth (cognate)

→ English piece (cognate)

→ Welsh beth (mention)

→ Welsh beth (mention)

→ Welsh pethau (affix)

→ Welsh rhywbeth (compound)

→ Welsh popeth (compound)

→ Welsh pethach (affix)

→ Danish pjece (cognate)

→ Irish cuid (cognate)

→ Scottish Gaelic cuid (cognate)

→ Galician peza (cognate)

→ Manx cooid (cognate)

→ Cornish peth (cognate)

→ Cornish pyth (cognate)

→ Old Irish cuit (cognate)

→ Albanian pjesë (cognate)