Malachai is a spelling of Malachi, the Hebrew name meaning "my messenger" or "my angel", borne by the prophet whose book closes the Old Testament. The -ai ending echoes the way the name is pronounced in English, MAL-a-kye, and sits between the standard Malachi and the Hawaiian-looking Malakai. Malachai ranked number 3866 in 2000, rose during the 2010s, peaked at number 1975 in 2022 and ranks number 2467 in 2025 with 55 boys.