James, son of Zebedee
The title, "the Less", is used to differentiate James from other people named James. Since it means that he is either the younger or shorter of two, he seems to be compared to one other James. In the lists of the twelve apostles in the synoptic Gospels, there are two apostles called James, who are differentiated there by their fathers: James, son of Zebedee, and James, son of Alphaeus. Long-standing tradition identifies James, the son of Alphaeus, as James the Less. James, son of Zebedee, is then called "James the Great" (although that designation does not appear in the New Testament). Some propose that Alphaeus was the same man as Cleophas or at least the husband of Mary Clopas.