He was a son of Abgaro Zachary and Helena Asiewicz-Passakasow. Her father Tomasz Asiewicz (former Osiewicz, Lith.Asevicius) is inscribed in encyclopedias of Polish nobles. Franciszek's uncle was bishop Grzegorz Zachariasiewicz (1740-1814).Many Zachariasiewiczes were Greek-catholic priests. Zachary (679-752) was the Rome Pope.
