WordNet (r) 3.0 (2006):

Levi
    n 1: (New Testament) disciple of Jesus; traditionally considered
         to be the author of the first Gospel [syn: Matthew,
         Saint Matthew, St. Matthew, Saint Matthew the
         Apostle, St. Matthew the Apostle, Levi]

Easton's 1897 Bible Dictionary:

Levi
   adhesion. (1.) The third son of Jacob by Leah. The origin of the
   name is found in Leah's words (Gen. 29:34), "This time will my
   husband be joined [Heb. yillaveh] unto me." He is mentioned as
   taking a prominent part in avenging his sister Dinah (Gen.
   34:25-31). He and his three sons went down with Jacob (46:11)
   into Egypt, where he died at the age of one hundred and
   thirty-seven years (Ex. 6:16).

     (2.) The father of Matthat, and son of Simeon, of the
   ancestors of Christ (Luke 3:29).

     (3.) Luke 3:24.

     (4.) One of the apostles, the son of Alphaeus (Mark 2:14; Luke
   5:27, 29), called also Matthew (Matt. 9:9).


Hitchcock's Bible Names Dictionary (late 1800's):

Levi, associated with him