Balbriggan is a town in the northern part of the administrative county of Fingal, in County Dublin, Ireland. According to P.W. Joyce the name arises from "Baile Breacain" [sic] which literally means "Brecan's Town". Brecan is a common medieval first name and there are several other Brackenstowns in Ireland. There is also a possible link to the local Bracken River, in which case the name could derive from breicín "little trout".
Many locals however have traditionally felt that Baile Brigín means "Town of the Little Hills", due to the relatively low hills that surround the town. This translation is not well founded as it appears to be derived from a phonetic deconstruction of a suggested spelling. It seems more likely that the town’s name is derived from the word Brecan, as the area was known in pre-Norse invasion times as Breaga, populated by a tribe or clan known as the Bregii and the aforementioned River Bracken.