Thanks for any help. It appears that my great grand father (Salvatore Deguarde) was born on 3/6/1879 in Mezzojuso, Palermo, Italy; which has been more or less consistent. But I did get a lead on an Italian birth record/log from this time period for him, so this is the only "old world" record I have. For my other family members, I found nothing. But I cannot find any passenger listing or manifests for when he came over to American, which happened about 11/14/1899 on the Tarter Prince, according to his records. But as you said this could be off. So I am not sure which year or ship he may have left, or which port he departed off of.
P.S. I have a great grand mother from Sicily; as well as great grand parents from Greece.