Probably for akbar; Akbor, the name of an Idumaean and of two Israelites -- Achbor.
see HEBREW akbar
H5907. Akbor
עַכְבֹּר עַכְבּוֺר, proper name, masculine (mouse, compare עַכְבָּר, see GrayProp. N. 93; עכבר Old Hebrew and Phoenician as proper name Lzb304 (compare also on similar Latin proper name ClGannJAs 1883, Fev.- Mar. 128)); — ᵐ5 Αχοβωρ:
1 Edomite Genesis 36:38-39, (P) = עַכְבֹּר 1 Chronicles 1:49 (Baer Ginsb).
2 courtier of Josiah 2 Kings 22:12, 14, perhaps also Jeremiah 26:22; 36:12 (compare Gie and Ency. Bib.).