Welsh -fed

← Proto-Brythonic *-β̃ed (inherited)

← Proto-Celtic *-metos (inherited)

← Irish -ú (cognate)

← Irish -mhadh (mention)

← Cornish -ves (cognate)

← Old Irish -mad (cognate)

→ Welsh -ed (mention)

→ Welsh unfed (suffix)

→ Welsh seithfed (affix)

→ Welsh wythfed (affix)

→ Welsh nawfed (affix)

→ Welsh deuddegfed (affix)

→ Welsh pymthegfed (affix)

→ Welsh deunawfed (affix)

→ Welsh ugeinfed (affix)

→ Welsh deugeinfed (affix)

→ Welsh canfed (affix)

→ Irish -ú (cognate)

→ Cornish -ves (cognate)