Three generations of Bushes descended on a Brickell area church Saturday for a wedding and Memorial Day weekend family reunion of the Republican Party's most enduring dynasty. The two former presidents -- George Herbert Walker Bush and George W. Bush -- were on hand, along with the former first ladies to watch as former Florida Gov. Jeb Bush's youngest son, John Ellis Bush Jr., 26, known as ``Jebby,'' married Coral Gables resident Sandra Algudady.