James the Just, or a variation of James, brother of the Lord, was a brother of Jesus, according to the New Testament. He was the first leader of the Jerusalem Church of the Apostolic Age. Traditionally, it is believed he was martyred in AD 62 or 69 by being stoned to death by the Pharisees on order of High Priest Ananus ben Ananus. James, Joses, Simon, and Judas are mentioned as the brothers or siblings of Jesus as well as two or more unnamed sisters.

Jacob is a common masculine given name of Hebrew origin. The English form is derived from the Latin Iacobus, from the Greek Ἰάκωβος (Iakobos), ultimately from the Hebrew יַעֲקֹב‎ (Yaʿaqōḇ), the name of Jacob, biblical patriarch of the Israelites, and a major figure in the Abrahamic religions. The name comes either from the Hebrew root עקב ʿqb meaning "to follow, to be behind" but also "to supplant, circumvent, assail, overreach", or from the word for "heel", עֲקֵב ʿaqeb. It can also be taken to mean "may God protect."