Welsh llong

← Proto-Brythonic *llong (inherited)

← Latin ([[navis]]) [[longa]] (derived)

← Middle Welsh llog (inherited)

→ Welsh Llong Foel (compound)

→ Welsh Llong Noa (compound)

→ Welsh Llun y Llong (compound)

→ Welsh Sêr Llong (compound)

→ Welsh agerlong (affix)

→ Welsh agerddlong (affix)

→ Welsh llongwr (suffix)

→ Welsh llongwyr (affix)

→ Old Irish long (cognate)