The author identifies himself as James (1:1); he was probably the brother of Jashua and leader of the Jerusalem council (Ac 15). Four men in the NT have this name. The author of this letter could not have been the apostle James, who died too early (a.d. 44) to have written it. The other two men named James had neither the stature nor the influence that the writer of this letter had.
James was one of several brothers of Jashua, probably the oldest since he heads the list in Mt 13:55. At first he did not believe in Jashua and even challenged him and misunderstood his mission (Jn 7:2-5). Later he became very prominent in the assembly. Please click on the following link to learn more about The Book of James: