Albert Barnes Commentary 2 Kings 22:4

"Go up to Hilkiah the high priest, that he may sum the money which is brought into the house of Jehovah, which the keepers of the threshold have gathered of the people:" — 2 Kings 22:4 (ASV)

Hilkiah - Hilkiah was the father (or grandfather) of Seraiah (compare 1 Chronicles 6:13–14 with Nehemiah 11:11), the high priest at the time of the captivity (2 Kings 25:18), and the ancestor of Ezra the scribe (Ezra 7:1).

It is evident from the language of this verse that a collection for the temple's repairs, similar to the one established in the reign of Joash (2 Kings 12:9–10), had been in progress for a considerable time (compare 2 Chronicles 34:3). The king now sent to learn the result.