Simon

The Siblings of Jesus:

In the Christian New Testament:
Mark 6:3 [Is not this the carpenter, the son of Mary and brother of James and Joses and Judas and Simon? And are not his sisters here with us?” And they took offense at him.]
Matthew 13:55 [55 “Isn’t this the carpenter’s son? Isn’t his mother’s name Mary, and aren’t his brothers James, Joseph, Simon and Judas?]

Mark as a Secondary Source: The Gospel of Mark is likely written about c. AD 66–70. Critical consensus views the author as knowing very little about the geography of Palestine and being unacquainted with Jewish customs - so probably a Hellenized Jew who lived outside of Palestine. https://en.wikipedia.org/wiki/Mark_the_Evangelist

Matthew as a Secondary Source: The current scholarly view is that it was written in the last quarter of the first century by an anonymous Jew familiar with technical legal aspects of scripture https://en.wikipedia.org/wiki/Gospel_of_Matthew