In the book Hidden Passions, Sam and Hank's parents were Benjamin Bennett and Margaret Joyce Bennett. They had at least four sons, including Sam and Hank (at least two sons were between Sam and Hank). Information in the book has not been confirmed on-screen and is not considered to be official since the information seen on the show contradicts much of what was said in the book. The show has never confirmed the names of Sam and Hank's parents, (though Jessica has stated on air that she named her son after her father, and great-grandfather) or the existence of the other brothers.
Read more about this topic: Bennett And Standish Families