R. Abdallah b. Abraham Somekh (1813–1889), rabbi and posek of Baghdad. R. Abdallah was born in Baghdad and was a pupil of R. Jacob b. Joseph ha-Rofe. At first he engaged in business, acquiring considerable wealth. When he perceived that the study of Torah was being neglected, however, he abandoned his business and devoted himself to the dissemination of learning. He founded the bet midrash Abu Menashe which was established with funds provided by the philanthropist Ezekiel b. Reuben Manasseh, after whom it was named. In 1840 he founded, with the help of the same philanthropist, the renowned Midrash Bet Zilkhah. He perished in a plague that swept through Baghdad, and was buried there, against the orders of the government, in the court of the traditional tomb of the high priest Joshua. This caused an outbreak of riots, in consequence of which rabbis and communal leaders were imprisoned. After three months, R. Somekh's body had to be exhumed and buried in another cemetery.

R. Somekh was regarded as the supreme halakhic authority by communities of Baghdadi origin throughout the Far East. He was the author of Zivhei Zedek, two more parts of the same work are still in manuscript; Ez ha-Sadeh on the tractate Bezah; novellae on most tractates of the Talmud; a commentary on the Passover Haggadah; Hazon la-Mo'ed, on the calendar; and responsa.