'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 person doesn't have a kinsman redeemer, but has become rich and found sufficient means for his redemption,

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