Relation to Irving Katz, Jr.Isaac (Ivan) Louis "Ike" Epstein, the husband of Alice Blumberg Epstein, the sister of Louis Eliel Blumberg, the father of Marjorie Ruth Blumberg Katz, the wife of Ellis Katz, the son of Robert E Katz, the brother of Irving Katz, the father of Irving Katz, Jr.