|Easton's Bible Dictionary|
Probably a Persian word meaning master of wine, i.e., chief butler; the title of an officer at the Babylonian court (Dan. 1:11, 16) who had charge of the diet of the Hebrew youths.
Int. Standard Bible Encyclopedia
mel'-zar (ha-meltsar; Septuagint Abiesdri, Theod. Hamelsad): Possibly a transliteration of the Babylonian Ameluucur, the officer to whom was entrusted the bringing-up of Daniel and his three companions (Daniel 1:11 the King James Version, the Revised Version (British and American) "the steward," margin "Hebrew: Hammelzar"). It has been suggested that the name is not the name of a person, but denotes the office of guardian, like the Babylonian maccaru. In this case the "l" would come by dissimulation from the first of the two "s" sounds, which on its side has come from an assimilated "n", the root being nacaru, "to protect" "to guard."
R. Dick Wilson
Melzar (2 Occurrences)
Daniel 1:11 Then said Daniel to Melzar, whom the prince of the eunuchs had set over Daniel, Hananiah, Mishael, and Azariah, (KJV WBS)
Daniel 1:16 Thus Melzar took away the portion of their meat, and the wine that they should drink; and gave them pulse. (KJV WBS)