I'm from sweden and have recently gained intresse in the name Vidal. My great grandmother's name was Marguerite Vidal. Her family comes from south of France, but some of them moved to Hamburg, Germany, after becoming Hugenotte (Jean Pierre Vidal,1666-1724). In 1867 Hugo Vidal moved from Hamburg to a manor called Rossared, about 60 kilometres from Gothenburg in Sweden. Anyway, another ancestor, Hugo Vidal, wrote a "family book" in german, given out in Hamburg 1930 by "Hans Christians Drückerei und Verlag" In an afterword (I found it in a drawer), he claims that he had found quite strong proof that the family is related to "Du Vidal de Montferrier en Languedoc".