Elishama

A man, in the time of the Divided Monarchy · named in 2 verses

the name means God of hearing Strong's Lexicon

Elishama was the grandfather of Ishmael, who assassinated Gedaliah, the governor appointed by the Babylonians.

From Easton's Bible Dictionary

Whom God hears. (1.) A prince of Benjamin, grandfather of Joshua (Num. 1:10; 1 Chr. 7:26).

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

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

First named at 2 Kings 25:25.

2 Kings 25:25 In the seventh month, however, Ishmael son of Nethaniah, the son of Elishama, who was a member of the royal family, came with ten men and struck down and killed Gedaliah, along with the Judeans and Chaldeans who were with him at Mizpah.
Jeremiah 41:1 In the seventh month, Ishmael son of Nethaniah, the son of Elishama, who was a member of the royal family and one of the king’s chief officers, came with ten men to Gedaliah son of Ahikam at Mizpah, and they ate a meal together there.