But do you know the names of his brothers?— Did he have sisters too?—

The Bible says that Jesus’ brothers were named “James and Joseph and Simon and Judas.” And Jesus had sisters who were alive when he was preaching. Since Jesus was the firstborn, these were all younger than he was.​—Matthew 13:55, 56; Luke 1:34, 35.

Were Jesus’ brothers also his disciples?— The Bible says that at first they were “not exercising faith in him.” (John 7:5) Later, however, James and Judas (also called Jude) became his disciples, and they even wrote books of the Bible. Do you know which books they wrote?— Yes, James and Jude.

At that time Jesus’ own brothers​—James, Joseph, Simon, and Judas—​did not believe that Jesus was God’s Son. They must not have believed what the angel Gabriel had told their mother. (Luke 1:30-33)