The Hebrew name Atsalyahu (H683) is a compound name meaning "whom the LORD has set aside" or "the LORD is noble." It refers to Azaliah son of Meshullam, who was the father of Shaphan the scribe — the man who found the Book of the Law during King Josiah's temple repairs.
Azaliah's significance lies in his son Shaphan, the royal scribe instrumental in one of the Old Testament's most dramatic moments: the rediscovery of the Book of the Law (2 Kings 22). The name — "whom the LORD has reserved" — is fitting for a family God set apart for this critical moment in Israel's history. God reserves people across generations for His purposes, a chain of faithfulness that often works invisibly until His appointed time.