Probably from the same as akkabiysh in the secondary sense of attacking; a mouse (as nibbling) -- mouse.
see HEBREW akkabiysh
H5909. akbar
עַכְבָּר noun masculine1 Samuel 6:4 mouse (Late Hebrew id.; Aramaic עַכְבְּרָא; Syriac (in Lexicons) , (PS22); Arabic plural mares murum Frey (Kam), compare also HomAs 338; Arabic of jerboa RSK 302; see TristrNHB 122 FFP10ff.); — absolute ׳הָע unclean Leviticus 11:29 (H), Isaiah 66:17 (compare RSSem i. 275, 2nd ed. 293); plural construct (ה)זָהָב עַכְבְּרֵי 1 Samuel 6:4, 11, 18; suffix עַכְבְּרֵיכֶם צַלְמֵי 6:5.