Marco 2:14

Λευῒν. Levi, the son of Alphaeus, the name here and in Lk. different from that given in first gospel, but the incident manifestly the same, and the man therefore also; Levi his original name, Matthew his apostle name. Mk. names Matthew in his apostle list (Marco 3:18), but he fails to identify the two, though what he states about Levi evidently points to a call to apostleship similar to that to the four fishermen (Marco 1:16; Marco 1:20).

The compiler of the first Gospel, having Mk. before him, and, noticing the omission, substituted the name Matthew for Levi, adding to it λεγόμενον (Marco 9:9) to hint that he had another name. ἀκολούθει μοι : a call to apostleship (in terms identical in all three Synoptics), and also to immediate service in connection with the mission to the publicans (vide on Mt.).