What relation was Samuel P. Bush to the 41st President of the USA, George H. W. Bush?
Samuel P. Bush:  He was the father of U.S. Senator Prescott Bush, grandfather of former U.S. President George H. W. Bush, and great-grandfather of former U.S. President George W. Bush and Governor Jeb Bush. George H. W. Bush:  Previously known as simply "George Bush", since 2001, Bush has often been referred to as "George H. W. Bush", "Bush 41", "Bush the Elder", or "George Bush Senior" to distinguish him from his eldest son, George W. Bush, the 43rd President of the United States.
grandfather