Jesus' brothers James, Joses, Judas and Simon. Also he had at least two sisters
3 Is not this the carpenter, the son of Mary, the brother of James, and Joses, and of Juda, and Simon? and are not his sisters here with us? And they were offended at him.
(Mark 6:3)
An alternative view is that Mary remained a perpetual virgin and did not have more children. So, James, Joses, Judas, Simon and his sisters were actually step-brothers and step-sisters
born to Cleophas/Alphaeus, brother of Joseph.