Sabo's Father is a Noble living in the Goa Kingdom on Dawn Island. Like his son, he wears a top hat, only his is adorned with feathers, a flower, and what appears to be a chain-like band. He has a thin mustache. He has on a suit with a flower on each lapel, with the one on the left having feathers similar to the ones seen on his hat. He wears an ascot underneath his suit's jacket.
(Source: One Piece Wikia)