Barzillai

A man, in the time of the United Monarchy · named in 1 verse

the name means iron-hearted Strong's Lexicon

Barzillai the Meholathite was the grandfather of the five sons Michal adopted.

From Easton's Bible Dictionary

Of iron. (1.) A Meholathite, the father of Adriel (2 Sam. 21:8).

Easton's Illustrated Bible Dictionary, 1897 — public domain, quoted in full and unedited.

Children Adriel

From STEPBible's TIPNR genealogy data. A relationship the data marks uncertain is not shown here.

First named at 2 Samuel 21:8.

2 Samuel 21:8 But the king took Armoni and Mephibosheth, the two sons whom Rizpah daughter of Aiah had borne to Saul, as well as the five sons whom Merab daughter of Saul had borne to Adriel son of Barzillai the Meholathite.