Yaakov Yeshayah Blau (1929–2013) was a

rabbi A rabbi () is a spiritual leader or religious teacher in Judaism. One becomes a rabbi by being ordained by another rabbi – known as ''semikha'' – following a course of study of Jewish history and texts such as the Talmud. The basic form of ...

and a '' dayan'' on the Badatz of the

Edah HaChareidis The Charedi Council of Jerusalem ( he, העדה החרדית, ''haEdah haCharedit'', Ashkenazi pronunciation: ''ha-Aideh Charaidis'' or ''ha-Eido ha-Chareidis''; "Congregation of God-Fearers") is a large Haredi Judaism, Haredi Judaism, Jewish comm ...

Jerusalem Jerusalem (; he, יְרוּשָׁלַיִם ; ar, القُدس ) (combining the Biblical and common usage Arabic names); grc, Ἱερουσαλήμ/Ἰεροσόλυμα, Hierousalḗm/Hierosóluma; hy, Երուսաղեմ, Erusałēm. i ...

. He was known as an expert in the '' halakhot'' of '' Choshen Mishpat'' and served as

halakhic ''Halakha'' (; he, הֲלָכָה, ), also transliterated as ''halacha'', ''halakhah'', and ''halocho'' ( ), is the collective body of Jewish religious laws which is derived from the written and Oral Torah. Halakha is based on biblical commandm ...

decisor for over 50 years. He was born in Jerusalem on 16 September 1929 and grew up in the home of Rabbi Yosef Tzvi Dushinsky, the first Dushinsky

rebbe A Rebbe ( yi, רבי, translit=rebe) or Admor ( he, אדמו״ר) is the spiritual leader in the Hasidic movement, and the personalities of its dynasties.Heilman, Samuel"The Rebbe and the Resurgence of Orthodox Judaism."''Religion and Spiritua ...

, who raised him after his father died when he was a young child. In his youth, he studied at the Etz Chaim Yeshiva. He authored various '' sefarim'' on the ''halakhot'' of loans and interest, as well as on the ''halakhot'' of

mikveh Mikveh or mikvah (, ''mikva'ot'', ''mikvoth'', ''mikvot'', or (Yiddish) ''mikves'', lit., "a collection") is a bath used for the purpose of ritual immersion in Judaism to achieve ritual purity. Most forms of ritual impurity can be purif ...

. As per the request of Rabbi

Yitzchok Yaakov Weiss Rabbi Yitzchok Yaakov Weiss (15 February 1902 – 14 June 1989), commonly known as the ''Minchas Yitzchak'' after the Responsa he authored, was the rabbi of the Edah HaChareidis in Jerusalem] at the time of his death, but his Halakha, halakhic in ...

, he was selected to serve as ''dayan'' on the Badatz of the Edah HaChareidis. He died on January 14, 2013 (age 84). He had three sons, Talmidei Chachamim.

References

{{DEFAULTSORT:Blau, Yaakov 1929 births 2013 deaths Authors of books on Jewish law Hebrew-language writers 20th-century rabbis in Jerusalem Rabbis of the Edah HaChareidis