Elçibəy (Azerbaijani) comes from Azerbaijani bəy, from Proto-Turkic *bēg, from Proto-Iranian bagáh, from Proto-Indo-Iranian bʰagás, from Proto-Indo-European bʰh₂g-ó-s, from Proto-Indo-European bʰeh₂g- — to divide, distribute, allot.
Ancestry of “Elçibəy”, step by step
Elçibəy traces back through two separate lines of ancestry.