"Variant of Malachi"
The name Malakai is commonly a male name from the "Hebrew" origin.
Malakai is a variant spelling of Malachi, the name of the prophet whose book closes the Hebrew Bible. The Hebrew form Mal'akhi is analysed as mal'akh, "messenger", with the first-person suffix -i, giving the sense "my messenger". The k spelling is also the usual form of the name in Tongan.
Malachi means "Messenger from God.".
The pronunciation of Malakai is MAL-uh-kye.