Louis Carreau dit Lafraischeur came at Quebec city, in New-France about 1646. He was from Bordeaux, France. He was the only one in Canada who worn this name. He's the ancestor of all Carreau and Careau of Canada, and, I think, of a large part of Carreau, Careau, Caro, Carrow, etc, of United States. I don't know more on the origin of the name in France.