In the book "Legacy Of Honor: The Values and Influence of America's Eagle Scouts" written by Alvin Townley it answers that. The largest known family that had biological brothers become eagles there were 11 of them. I know imagine 11 kids. It was the Thomase. Their names were Decall, Devon, Darren, Robert, Ralph, Gordon, Gilbert, Charles, Eddie, Harvey and Rex. The only person that didnt acheive the rank of eagle was their sister Elaine. Their troop is out of Las Vega, Nevada. Check out the book i got it as a gift for my eagle court of honor