'Guardian' in the Bible

Naomi said to her daughter-in-law, "May he be rewarded by the Lord because he has shown loyalty to the living on behalf of the dead!" Then Naomi said to her, "This man is a close relative of ours; he is our guardian."

He said, "Who are you?" She replied, "I am Ruth, your servant. Marry your servant, for you are a guardian of the family interests."

Now yes, it is true that I am a guardian, but there is another guardian who is a closer relative than I am.

Now Boaz went up to the village gate and sat there. Then along came the guardian whom Boaz had mentioned to Ruth! Boaz said, "Come here and sit down, 'John Doe'!" So he came and sat down.

Then Boaz said to the guardian, "Naomi, who has returned from the region of Moab, is selling the portion of land that belongs to our relative Elimelech.

The guardian said, "Then I am unable to redeem it, for I would ruin my own inheritance in that case. You may exercise my redemption option, for I am unable to redeem it."

So the guardian said to Boaz, "You may acquire it," and he removed his sandal.

The village women said to Naomi, "May the Lord be praised because he has not left you without a guardian today! May he become famous in Israel!