Barzillai, from the Hebrew name pronounced bar-zil-aw-ee, meaning man of iron, was among the friends of King David who supplied him when he was forced to flee across The Jordan River from Jerusalem at the beginning of Absalom's rebellion.
"17:27 And it came to pass, when David was come to Mahanaim, that Shobi the son of Nahash of Rabbah of the children of Ammon, and Machir the son of Ammiel of Lodebar, and Barzillai the Gileadite of Rogelim, 17:28 Brought beds, and basins, and earthen vessels, and wheat, and barley, and flour, and parched corn, and beans, and lentiles, and parched pulse, 17:29 And honey, and butter, and sheep, and cheese of kine, for David, and for the people that were with him, to eat: for they said, The people is hungry, and weary, and thirsty, in the wilderness." (2 Samuel 17:27-29 KJV)
"The king answered, Chimham shall go over with me"
After the rebellion was defeated (see Absalom's Advisors), David returned to Jerusalem. As he was crossing the Jordan, David invited Barzillai to come to live in Jerusalem. Barzillai appreciatively declined the offer due to his advanced age, but suggested that his "servant" Chimham (who was likely Barzillai's son) go instead.
"19:31 And Barzillai the Gileadite came down from Rogelim, and went over Jordan with the king, to conduct him over Jordan. 19:32 Now Barzillai was a very aged man, even fourscore years old: and he had provided the king of sustenance while he lay at Mahanaim; for he was a very great man. 19:33 And the king said unto Barzillai, Come thou over with me, and I will feed thee with me in Jerusalem.
Years later, as he was about to die, the still-grateful David gave instructions to his son and successor Solomon (see The United Kingdom) to settle a number of old accounts, including to "show kindness unto the sons of Barzillai (i.e. reason that, as stated above, "servant" meant son) the Gileadite, and let them be of those that eat at thy table: for so they came to me when I fled because of Absalom thy brother."
"2:1 Now the days of David drew nigh that he should die; and he charged Solomon his son, saying, 2:2 I go the way of all the earth: be thou strong therefore, and show thyself a man; 2:3 And keep the charge of the LORD thy God, to walk in his ways, to keep his statutes, and his commandments, and his judgments, and his testimonies, as it is written in the law of Moses, that thou mayest prosper in all that thou doest, and whithersoever thou turnest thyself: 2:4 That the LORD may continue his word which he spake concerning me, saying, If thy children take heed to their way, to walk before me in truth with all their heart and with all their soul, there shall not fail thee (said he) a man on the throne of Israel.
Fact Finder: Was "the habitation of Chimham, which is by Bethlehem" (KJV) still known in Israel centuries (there were about 4 centuries between the time of David and the time of Jeremiah) later?