ffionn is a name of Welsh origin, derived from the name of a 5th-century saint. It is composed of two elements, ffion, meaning fair or white, and n, a common Welsh suffix. The name ffionn is associated with the legend of Saint Fionn mac Cumhaill, a powerful Irish leader and warrior. In medieval times, the name ffionn was popularized by the Norman Conquest of Ireland, where it was introduced by the Normans. The name has since been adopted by various cultures, including the Irish, Welsh, and Scottish. ffionn is also associated with the Celtic goddess of the fairies, and its meaning is often interpreted as a combination of these two elements.