Aharon Mordechai was born to Rabbi Yissachar Dov Rokeach and Sarah Hager, daughter of Rabbi Moshe Yehoshua Hager, the futureVizhnitzer Rebbe, after 10 years of marriage. His birth was a cause for great celebration in the Belz Hasidic dynasty, as it meant that the dynasty would continue to be passed down within the Rokeach family line. His father, Rabbi Yissachar Dov, was also an only child, born in 1948 to Rabbi Mordechai of Bilgoray after the latter's escape from Nazi-occupied Europe with his half-brother, Rabbi Aharon. Rabbi Mordechai died suddenly a year after his son's birth, and the boy was raised and groomed to be the next Rebbe by his uncle, Rabbi Aharon, who died in 1957. Rabbi Yissachar Dov was crowned Rebbe in 1966.
The bar mitzvah of Aharon Mordechai's eldest son was also cause for tremendous celebration in Belz. Sholom, named after the first Belzer Rebbe, the Sar Sholom, celebrated his bar mitzvah on 26 February 2008. The bar mitzvah tish was conducted by the Belzer Rebbe in the presence of thousands of Hasidim and dozens of other Rebbes and Torah leaders. As the Belz Great Synagogue was not large enough for the crowd, a giant tent with bleachers was erected out in the courtyard. Festive meals and other events were held for the women in all five halls of the Jerusalem Convention Center. On 21 May 2013 their eldest son, Sholom Rokeach, married Hana Batya Panneth in a ceremony at the Belz Great Synagogue that was attended by tens of thousands of guests and well-wishers. A daughter was born to the young couple on 4 May 2014. The names of the rest of the children are as follows:
Malka Esther, married Avrohom Safrin, a grandson of the Komarno Rebbe from Yerushalayim.
Avrohom Shmuel Tzvi, married Shifra Leah, daughter of Rabbi Dov Rechnitzer, the belzer rosh yeshiva in Haifa.
Nechuma Golda, married Sholom Aryeh, son of Rabbi Aharon Zwibbel, one of the Rabbis of the Belzer community.
Elimelech Noson Nota married daughter of Rabbi Avrum Yakov Sharf, one of the Rabbis of the Belzer community.
Chaim Meir.
Dovid.
Yisroel Menachem Nochum.
Henna Chaya Devorah.
Usher Yeshyah Yehuda.
Eluzer Yechezkel Shraga.
Moshe Yehoshua.
Shlomo Naftoli Elchonon.
Current activities
In the late 2000s Rokeach began assuming more responsibilities given to him by his father, the Belzer Rebbe. He currently serves as the chairman of the educational board of all Belzer institutions and makes many fund-raising trips abroad on his father's behalf.