🔼The name Malchiel in the Bible
There's only one Malchiel mentioned in the Bible, and he is the son of Beriah, who is one of the sons of Asher, who is the eighth son of Jacob and patriarch of one of the twelve tribes of Israel. Malchiel is mentioned three times, but always in a genealogy: Genesis 46:17, Numbers 26:45, 1 Chronicles 7:31. Malchiel is nevertheless quite successful as a patriarch of his own; his progeny became collectively known as the מלכיאלי (Malchielites), a sub-class in the tribal structure of Asher (Numbers 26:45).
🔼Etymology of the name Malchiel
The first part of our name comes from the common noun מלך (melek), meaning king:
In between the two elements sits the letter י (yod), which probably should be construed as creating a possessive form out of the מלך-part: meaning either my king or king of.
For a meaning of the name Malchiel, NOBSE Study Bible Name List appears to ignore the yod and reads God Is King. Alfred Jones (Dictionary of Old Testament Proper Names) opts for the king-of meaning, and reads King Of God. BDB Theological Dictionary figures the yod to create my-king and reads My King Is El.