Heir

Boyd’s Bible Dictionary:

(inheritor). Eldest son became head of tribe or family with largest share of paternal estate; sons of concubines given presents; daughters, a marriage portion (Gen. 21:10, 14; 24:36; 25:6; 31:1410Wherefore she said unto Abraham, Cast out this bondwoman and her son: for the son of this bondwoman shall not be heir with my son, even with Isaac. (Genesis 21:10)
14And Abraham rose up early in the morning, and took bread, and a bottle of water, and gave it unto Hagar, putting it on her shoulder, and the child, and sent her away: and she departed, and wandered in the wilderness of Beer-sheba. (Genesis 21:14)
36And Sarah my master's wife bare a son to my master when she was old: and unto him hath he given all that he hath. (Genesis 24:36)
6But unto the sons of the concubines, which Abraham had, Abraham gave gifts, and sent them away from Isaac his son, while he yet lived, eastward, unto the east country. (Genesis 25:6)
14And Rachel and Leah answered and said unto him, Is there yet any portion or inheritance for us in our father's house? (Genesis 31:14)
; Judg. 11:22And Gilead's wife bare him sons; and his wife's sons grew up, and they thrust out Jephthah, and said unto him, Thou shalt not inherit in our father's house; for thou art the son of a strange woman. (Judges 11:2)). Real estate apportioned as (Deut. 21:1717But he shall acknowledge the son of the hated for the firstborn, by giving him a double portion of all that he hath: for he is the beginning of his strength; the right of the firstborn is his. (Deuteronomy 21:17); Num. 27:4-114Why should the name of our father be done away from among his family, because he hath no son? Give unto us therefore a possession among the brethren of our father. 5And Moses brought their cause before the Lord. 6And the Lord spake unto Moses, saying, 7The daughters of Zelophehad speak right: thou shalt surely give them a possession of an inheritance among their father's brethren; and thou shalt cause the inheritance of their father to pass unto them. 8And thou shalt speak unto the children of Israel, saying, If a man die, and have no son, then ye shall cause his inheritance to pass unto his daughter. 9And if he have no daughter, then ye shall give his inheritance unto his brethren. 10And if he have no brethren, then ye shall give his inheritance unto his father's brethren. 11And if his father have no brethren, then ye shall give his inheritance unto his kinsman that is next to him of his family, and he shall possess it: and it shall be unto the children of Israel a statute of judgment, as the Lord commanded Moses. (Numbers 27:4‑11)).