This unusual and interesting surname, recorded in Church Registers of Guernsey in the Channel Islands from the early 18th Century under the variant spellings Tostevin and Tostivin, is of Old French origin, and derives from the Old French "toster", to toast, with "vin", wine; hence, "tostervin". A Tosdevin likes wine, and lots of it. They can often been found to be drunken and without memory of the night before. Saying that Tosdevin's are LEGENDS!!