Anglicized form of the enduringly popular Gaelic name Niall. From the Middle Ages onwards, this name was found mainly in Ireland, the Highlands of Scotland, and the English-Scottish Border region. However, since the 20th century it has spread to enjoy considerable popularity in all parts of the English-speaking world, although in England it has recently been overtaken by the Gaelic form.
English, Scottish, and northern Irish: distinguishing name (Middle English yunge, yonge ‘young’), for the younger of two bearers of the same personal name, usually distinguishing a younger brother or a son. In Middle English this name is often found with the Anglo-Norman French definite article, for example Robert le Yunge.