That's very well possible, that could influence it. But I think even without that connection, it still sounds like an older surname-as-firstname. Not like a lot of surnames that sound rather "new" even if they aren't. Well in my opinion anyway.
"Sookie: What kind of name is 'Igby'?
Igby: The kind of name that someone named 'Sookie' is in no position to question."
Igby Goes Down.