He is the son of the uncle of Jeremiah (prophet). He was told to buy a field from him.
Jer 32:7Behold, Hanamel the son of Shallum your uncle will come to you and say, ‘Buy my field that is at Anathoth, for the right of redemption by purchase is yours.’Jer 32:8Then Hanamel my uncle’s son came to me in the court of the guard, according to the word of the Lord, and said to me, ‘Please buy my field that is at Anathoth in the land of Benjamin, for the right of possession and redemption is yours; buy it for yourself.’ Then I knew that this was the word of the Lord.Jer 32:9I bought the field at Anathoth from Hanamel my uncle’s son, and weighed out the money for him, seventeen shekels of silver.Jer 32:10I signed the deed, sealed it, got witnesses, and weighed the money on the scales.Jer 32:11Then I took the sealed deed of purchase, containing the terms and conditions, and the open copy.Jer 32:12And I gave the deed of purchase to Baruch the son of Neriah, son of Mahseiah, in the presence of Hanamel my uncle’s son, and in the presence of the witnesses who signed the deed of purchase, and in the presence of all the Judeans who were sitting in the court of the guard.