The Scottish surname McCulloch, long established in southwestern Scotland is of patronymic origin. The name is related to the Northern Irish name McCullough. Both names are anglicized forms of the Gaelic surname Mac Cú Uladh, a patronymic from Cú Uladh  meaning “the hound of Ulster.” The first known recording is that of Thomas Maculagh, given in the records of the proceedings of the government of Scotland as being "del counte de Wyggetone" in the year 1296. This was when he gave his allegiance to the government of John Balioll known as "The Interregnum" of 1296, it being overthrown by Robert, The Bruce, in 1306. Today there are approximately 8,000 bearers of the surname McCulloch living in The United States.

MCCULLOCH EMPEROR SQUARE RING