Goel

In Hebrew the participle of the verb gaal, “to redeem.” It is rendered in the Authorized Version “kinsman,” Num 5:8; Ruth 3:12; Ruth 4:1, Ruth 4:6, Ruth 4:8; “redeemer,” Job 19:25; “avenger,” Num 35:12; Deut 19:6, etc. The Jewish law gave the right of redeeming and repurchasing, as well as of avenging blood, to the next relative, who was accordingly called by this name. (See Redeemer.)

From Easton’s Bible Dictionary (1897), by Matthew George Easton.