Relation to Irving Katz, Jr.Nat Sandler, the husband of Rosalyn Zora Blumberg, the daughter of Reuben Amon Blumberg, the brother of Louis Eliel Blumberg, the father of Marjorie Ruth Blumberg Katz, the wife of Ellis Robert Katz, the son of Robert Ellis Katz, the brother of Irving Katz, the father of Irving Katz, Jr.