Resolute protector
Uilliam is the Irish Gaelic form of the name William. It is derived from the Germanic name Willahelm, combining the elements 'wil' (will or desire) and 'helm' (helmet or protection).
Fewer than 5 boys were named Uilliam in 2025.
US births per 5-year period, 1990–present (SSA data).
Archbishop of Tuam and translator of the New Testament into Irish
