**One question: were ANY of the Jameses ever identified as son of Mary, as Jesus was?**
No
No
Maybe not, but Mary was called the Mother of James.
Matthew 27:56
Mark 15:40 and 47
Mark 16:1
Luke 24:10
Again, the context of the passages in question indicate these to be His brothers.....the sons and daughters of Joseph and Mary.
The Roman Catholic wants the texts to say Joseph and Mary had relations (but I imagine the RC would debate this term as well) and produced James.