Swanny, Swanno or just plain old grandpa?

What will the newborn granddaughter of the world's best treasurer 2011 call her grandfather?

Wayne Swan is grappling with this question, as his family celebrates daughter Erinn and son-in-law John's new arrival.

"What would my grandchild call me? Swanno? Swanny?" Mr Swan said in a Facebook post, adding that he was nervous about his new role.