Uncle Piero Fairywinkle, Uncle Carmino Fairywinkle and numerous others are Big Daddy's brothers.
All of them conform Big Daddy's company, with being Piero and Carmine the main ones, as they are the only ones mentioned by name. They seem to have a very close relationship with their niece Wanda, and they have more confidence with her because they asked her to take control of the company when Big Daddy disappeared. At the end of the episode, they make a party for Wanda thanking her for the changes she made in the company. Frankie the Butcher may be a brother of Big Daddy because in the episode Talkin 'n Trash, when Big Daddy arrived in Timmy's house he asked where was Franco and Piero.
They dress similar to Big Daddy, wearing suits and fedora hats, but still carry wands and have crowns.