I was using the dictionary yesterday and happened to see the name Thomas.
It traced the name back through several languages all the way to Aramaic
in which it means: a twin.
If I recall what I read correctly, Sylvia was talking about the Gospel of Thomas
and said he may have been Jesus' twin brother. But she did not state as fact
that Jesus had a twin brother. Even if Thomas was His brother, and a twin
that doesn't mean he was a twin to/with Jesus. Jesus did have other siblings...
See how easily we deceive ourselves?
By our prejudice.