I have a unique name situation and hope that someone can help shed some light on the reason for such naming.
My maternal grandfather is Gregorio Zambuto Sitra, from Agrigento (Girgenti) Sicily. I have found many Zambutos but only a few with the Sitra ending. I have traced the family, so far, back to the mid-1700. All have Zambuto Sitra.
My question is: Why a double name? It does not seem to be the usual custom, although I've seen other Zambutos with a different Suffix, and also another ancestor's surname is Rizzo Zangali.
Why two surnames? Any help would be appreciated.