Nathan-melech is described as one of Josiah

Josiah

Josiah or Yoshiyahu or Joshua was a king of Judah who instituted major reforms. Josiah is credited by most historians with having established or compiled important Jewish scriptures during the Deuteronomic reform that occurred during his rule.Josiah became king of Judah at the age of eight, after...

's officials n 2 Kings

Books of Kings

The Book of Kings presents a narrative history of ancient Israel and Judah from the death of David to the release of his successor Jehoiachin from imprisonment in Babylon, a period of some 400 years...

 23:11 of the Hebrew Bible

Hebrew Bible

The Hebrew Bible is a term used by biblical scholars outside of Judaism to refer to the Tanakh , a canonical collection of Jewish texts, and the common textual antecedent of the several canonical editions of the Christian Old Testament...

. He lived near the entrance to the temple, close to the courtyard where the horses had been kept that were used in sun-worship before Josiah disposed of both the horses and the chariots that they had pulled.

Nathan-melech means King's gift. Some authorities have regarded the name as a variant of Nathan but this is no more valid sociolinguistically

Sociolinguistics

Sociolinguistics is the descriptive study of the effect of any and all aspects of society, including cultural norms, expectations, and context, on the way language is used, and the effects of language use on society...

 than regarding Nathanael

Nathanael

Nathaniel is a male name and surname. It comes from the Hebrew name נְתַנְאֵל/Nethan'el meaning "God has given"...

as a variant of Nathan, or Rosemary as a variant of Mary. They are distinct names.