as we've been discussing lately, Ashekenazi Jews who moved to non-Ashkenazi countries were dubbed there as Ashkenazi, and some continued to use the surname when returning to Ashkenazi countries.
which was very confusing to me as a 9 year old when my dad explained to me the difference between Ashkenazim and Sephardim, because one of the few Sephardic families at our Shul was indeed surnamed Ashekenazi !!! :o)
