Boyd’s Bible Dictionary:
Not a proper name, but an army official, like general or commander-in-chief
(2 Kings 18:17; Isa. 20:1).
Concise Bible Dictionary:
The title of an Assyrian officer sent to Hezekiah (2 Kings 18:17). The same or another was sent to Ashdod (Isa. 20:1). The name is supposed to signify “commander in chief.”
Strong’s Dictionary of Hebrew Words:
Meaning:
of foreign derivation; Tartan, an Assyrian
Jackson’s Dictionary of Scripture Proper Names:
release the dragon
Potts’ Bible Proper Names:
The greatest extension; commander-in-chief:―an Assyrian, 2 Kings 18:17. {Extensio maxima}