Yitzhak Meir Horowitz
M. Chaia Wiener            |--- Morris B. Horowitz (1887-1947)
(Daughter of Moshe Dov & ?      M. Bertha Hauser |--- Alvin Jerome Horowitz (1916-1921)
 Died 1943)                      (1895-1997)     |
                                                 |
                                                 |--- Cecille Horowitz (1922-1991)
                                                 |     M. Philip Sturm   |--- Michael Sturm (1952)
                                                 |      (1913-1999)           M. Rachel (Patricia) O'Brien (1956)
                                                 |
                                                 |--- Harriet Horowitz (1924-1980)
                                                      M. Jack Heistein   |--- Martin Heistein (1954)
                                                       (1913-1986)       | M. Jeanette Lifschitz |--- Judith Heistein (1984)
                                                                         |                       |    M. Daniel Sabba
                                                                         |                       |
                                                                         |                       |--- Aryeh Heistein (1987)
                                                                         |                       |
                                                                         |                       |--- Adina Heistein (1994)
                                                                         |
                                                                         |--- Charles Heistein (1958-1996)