Latin occāsiō

→ Welsh achos (derived)

→ French occasion (mention)

→ Old French encheson (mention)

→ Irish ócáid (borrowed)

→ Irish aicis (derived)

→ Italian cagionare (inherited)

→ Polish okazja (borrowed)

→ Romanian cășuna (inherited)

→ Old Irish accuis (derived)

→ Middle Welsh achaws (derived)