Related? No, I'm afraid not, but I knew of someone a long time ago who bore the last name of Callahan-Girani... he was quite fond of the Girani side to his name. I asked him of the family, he didn't say much... he fascinated me, you could say, and it started my search into the Girani history... which I can find little of. Is there anything more you could tell me about your surname, Peter? Origin, perhaps?... I thank you for your message and hope to keep in contact.
Peace,
"Enteqam"