Does johnny mathis have any siblings?

Born John Royce Mathis on September 30, 1935 in Gilmer, Texas, Johnny Mathis is the fourth born child of seven children born to Clemmie Lamont Mathis, Sr. and Mildred Boyd Mathis. His eldest siblings are a sister Marguerite, brother Clem, Jr. (now deceased), and sister Elizabeth. After Johnny Mathis' birth his parents had three more children which are Mathis' youngest siblings: brother Ralph, sister Linda, and brother Michael.