Judges 8:31

and his concubine, who is in Shechem, hath born to him -- even she -- a son, and he appointeth his name Abimelech.

Genesis 16:15

And Hagar beareth to Abram a son; and Abram calleth the name of his son, whom Hagar hath borne, Ishmael;

Genesis 20:2

and Abraham saith concerning Sarah his wife, 'She is my sister;' and Abimelech king of Gerar sendeth and taketh Sarah.

Genesis 22:24

and his concubine, whose name is Reumah, she also hath borne Tebah, and Gaham, and Tahash, and Maachah.

Judges 9:1-5

and Abimelech son of Jerubbaal goeth to Shechem, unto his mother's brethren, and speaketh unto them, and unto all the family of the house of his mother's father, saying,

Judges 9:18

and ye have risen against the house of my father to-day, and slay his sons, seventy men, on one stone, and cause Abimelech son of his handmaid to reign over the masters of Shechem, because he is your brother --

Treasury of Scripture Knowledge

Summary

And his concubine that was in Shechem, she also bare him a son, whose name he called Abimelech.

Bible References

Concubine

Judges 9:1
and Abimelech son of Jerubbaal goeth to Shechem, unto his mother's brethren, and speaketh unto them, and unto all the family of the house of his mother's father, saying,
Genesis 16:15
And Hagar beareth to Abram a son; and Abram calleth the name of his son, whom Hagar hath borne, Ishmael;
Genesis 22:24
and his concubine, whose name is Reumah, she also hath borne Tebah, and Gaham, and Tahash, and Maachah.