Hello,On my dad's certificate of

Hello,
On my dad's certificate of birth his first name is Aspano. He was born in the USA. The parents are from Palermo Sicily. However my grand ma and siblings would call him that name. His name that I thought was his real name is Jasper. Now apparently he says, that's the American version. Of what? He didn't really have an answer. I looked it up and it's gaspare. But he said no, that's not his real Sicilian name! Is anyone familiar with Aspano? Not even sure if the spelling is correct, yet it is on the birth certificate.
Much thanks,
Linda Mathew