'Redeemer' in the Bible

"If your brother becomes so poor that he has to a sell portion of his inheritance, then his nearest kinsman redeemer is to come and redeem what his brother has sold.

If a man has no family redeemer, but he prospers and obtains enough to redeem his land,

Then he [or his redeemer] shall calculate with his purchaser from the year when he sold himself to the purchaser to the Year of Jubilee, and the [original] price of his sale shall be adjusted according to the number of years. The time he was with his owner shall be considered as that of a hired man.

If a kinsman redeemer decides to redeem it, then he is to add a fifth to your valuation."