Judges 8:31

his concubine that was in Shechem A connexion of this kind is illustrated by early Arabian custom: the woman, or -female friend" (ṣadâḳa), did not leave her home, the union was of a temporary character (hence the term, mot-amarriage) and required no consent from parents or guardians, the children remained with their mother and belonged to her tribe; cf. Judges 9:1; Judges 9:14. Robertson Smith, Kinship and Marriage in early Arabia, p. 69 ff. The narrative seems to imply that the woman was a Canaanite.

and he called his name Abimelech lit. set, an idiom found only in late writings 2 Kings 17:34; Nehemiah 9:7; Daniel 1:7. Abimelechdoes not mean -my father (Gideon) is king," but probably -Melech (i.e. the divine king) is father." See Gray, Hebr. Pr. Names, pp. 75 86.