I Am Trying To Trace An Ancestor Named Elef Grotta From Veblungnes Romsdalen, Norway. He Was Born About 1835, And Emigrated To America. I Need To Find Out His Ancestry, And If He Was Born In Norway. We Believe He Was Really Italian?

It is vital to determine if this was true, or if his ancestors were really of Norwegian Lineage. Does any one know the source of sir name Grotta? Or the meaning of sir name Grotta? Could the sir name be derived from a town in Italy? Any help with this would be deeply appreciated.