The origin of the base az- is unclear.
Harari
azziyu - he (polite form when speaking of someone)
(EDH 39)
Combination of the base az- and the 3 pl. pronominal suffix.
Based on the same element az- that is present in the 3 sg. pronouns. Extended through the element -ziy-, whose origin is unknown, and the nominal plural marker -ač (Bulakh–Kogan 2013b:100).
Harari
agām - kind of berry
(EDH 21)
Also Ancient Har. igir, Cerulli 1936:407, Wagner 1983:269.