Gallagher (also found as Gallager, Gallaher) is an anglicization of the Irish surname O' Gallchobhair. This is derived from the personal name Gallochobhar, which comes from the Irish elements gall meaning "foreign" and cabair meaning "help." In Ireland it is generally pronounced /GALL a her/, while in England and North America, the second "g" is pronounced, making it /GALL a ger/.