English form of the Late Latin name Iacomus, a variant of the Biblical Latin form Iacobus, from the Hebrew name Ya'aqov (see Jacob). This was the name of two apostles in the New Testament. The first was Saint James the Greater, the apostle John's brother, who was beheaded under Herod Agrippa in the Book of Acts. The second was James the Lesser, son of Alphaeus. Another James (known as James the Just) is also mentioned in the Bible as being the brother of Jesus.