Welsh -ach

← Proto-Brythonic *-ox (inherited)

← Welsh -af (mention)

← Welsh -iach (link)

← Middle Welsh -ach (inherited)

→ Welsh na (mention)

→ Welsh corrach (affix)

→ Welsh cyfrinach (affix)

→ Welsh -af (mention)

→ Welsh pethach (affix)

→ Welsh bellach (suffix)