St James the Less

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 traditionally identifies 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", who is also the mother of Joseph, who is called Joses by Mark (Joseph and Joses are variants of the same name). There are four mentions:

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 Joseph/Joses. In Matthew 27:56 she is clearly distinguished from the mother of 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.

...
Wikipedia