R. Isaac Eisik ben Jacob Haver Wildmann (Haver; 1789–1853) served as rabbi in Poland-Lithuania, in in the communities of Rozinoi, Volkovysk, Tikocyn, Siauliai, and Suwalk. In addition to his eminence in halakhah, he was a kabbalist in the tradition of the school of R. Elijah ben Solomon Zalman, the Gaon of Vilna. R. Wildmann was the author of Magen ve-Zinnah (Johannisbrg, 1855), a defense of Kabbalah against the attacks in Ari Nohem attributed by many to R. Judah Leone Modena. R. Wildmann was a prolific writer in both halakhah and Kabbalah. His other works include: Beit Yizhak (Suwalk, 1836), on the negative and positive commandments; Beit Olamim (1889) on the Idra Rabba, a part of the Zohar; Yad Hazakah (1842), a commentary on the Passover Haggadah; Pithei She'arim (1888), a detailed exposition of Isaac Luria’s kabbalistic system; Be'er Yizhak (1889), a commentary on the rabbinical collectanea Likkutei ha-Gra of the Gaon of Vilna.
חלק א: מחלק ש"ע או"ח ויו"ד. דפוס צבי יעקב באמבערג, בשנת ת'ו'ר'"ה' [תרי"א]. ח, קמז,  דף. דף ג-ז: פתיחה, מאת בן המחבר, ר' יוסף "הרב דק' קנישין". הוסיף גם הגהות.