Malchiah

A man, in the time of the Divided Monarchy · named in 3 verses

the name means king of (i.e. appointed by) Jah Strong's Lexicon

Malchiah, son of Pashur, was involved in a plot against Jeremiah.

From Easton's Bible Dictionary

Jehovah's king. (1.) The head of the fifth division of the priests in the time of David (1 Chr. 24:9).

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

Children Pashhur

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

First named at Jeremiah 21:1.

Jeremiah 21:1 This is the word that came to Jeremiah from the LORD when King Zedekiah sent to him Pashhur son of Malchijah and the priest Zephaniah son of Maaseiah. They said,
Jeremiah 38:1 Now Shephatiah son of Mattan, Gedaliah son of Pashhur, Jucal son of Shelemiah, and Pashhur son of Malchijah heard that Jeremiah had been telling all the people:
Jeremiah 38:6 So they took Jeremiah and dropped him into the cistern of Malchiah, the king’s son, which was in the courtyard of the guard. They lowered Jeremiah with ropes into the cistern, which had no water but only mud, and Jeremiah sank down into the mud.