Welsh porth

← Proto-Brythonic *porθ (inherited)

← Proto-Brythonic *porθ (inherited)

← Welsh porthi (mention)

← Welsh porth awyr (link)

← Latin porta (borrowed)

← Latin portus (borrowed)

→ Welsh cymorth (affix)

→ Welsh adborth (affix)

→ Welsh atborth (affix)

→ Welsh porthor (link)