Sarfati/y is common among Tunisian Jews as well. There was a famous Tunisian-Jewish comedian whose main character was a Tunisian version of a Yiddishe Mamme combined with the Creedmoorer Rebbetzin, and she was called Mme (Mrs) Sarfaty.
So is Narboni, which seems to indicate an origin in Narbonne, France – no idea how it got to Tunisia or whether I am perhaps making a mistake with its origins. I will see what I can find about the historical origins of those surnames and whether there was a particular known migration of Jews directly from today’s France to North Africa (as those names would suggest) on motzash or Sunday when I have some time.
yes, Shapiro comes from Speyer. Horowitz (often a Levi) comes from Horovice in Bohemia or Moravia.