I'm looking for some information about how to best track a dead end relative back to Spain. All I know is that Joseph G. Gallardo was born in Spain in 1812 and moved to New Orleans, LA before 1846 as his first child was born in NOLA. Is there a particular region in Spain that the Gallardo family was concentrated in? I feel as if I've hit a bit of a brick wall as I can't manage to trace anything back earlier than 1846, but by having death information I was able to get his date of birth.
Joseph married Christina M. Wood in Louisiana by 1846, and they both lived in New Orleans until their respective deaths. If anyone has any leads or suggestions of where to keep looking it would be greatly appreciated.