Put a lot of thought into this have you? Why is it so important to you? What are their names? How many were there? What ages were they? What other serious bible scholars have studied your line of rational? Are there other historical references to support your speculation?
What sources? Well, let’s begin with the New Testament:
“Then Jesus’ mother and brothers arrived. Standing outside, they sent someone in to call him.”
Mark 3:31
As far as names go, James the Just, is the most well known.