When I lived in France, all anyone could ever tell me was that it was a place name. My father was under the impression that our ancestor Louis came from Brittany. Later I found the same information you have, that the family name came from a place in Normandy. Since the border of Brittany and Normandy fluctuated over the years, perhaps the origin was Breton. There is a website about the town, but I didn't find much information there: http://www.veigne.fr/championniere.htmhttp://www.veigne.fr/championniere.htm .There is a Lanteigne Family Tree on Facebook that has a photo of a house said to be where Louis was born, along with a lot of other family information both old and new.