James the Less is a figure of Early Christianity. He is also called "the Minor", "the Little", "the Lesser", or "the Younger", according to translation. He is not to be confused with James, son of Zebedee ("James the Great"). In most opinions he might be the same person with James, son of Alphaeus, but the sources offer no certainty. In the past, the Western church used to identify him with James, the Lord’s brother ("James the Just")
In the New Testament, the name "James" identifies multiple men. James the Less is named only in connection with his mother "Mary" in Mark 15:40, who is also the mother of Joses (Joseph). "Mary the mother of James" is referred to in two other places, but he is not called "James the Less" there. This "Mary" may have been Mary of Clopas (alternately Cleophas), mentioned only in John 19:25. It is unlikely to be Mary the mother of Jesus since she is not identified as Jesus' mother but only called the mother of James the Less and Joses.
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", which is not a name found anywhere in the New Testament. Some propose that Alphaeus was the same man as Cleophas or at least the husband of Mary Clopas.