The undergarment was called a “tunic”.  If one was wearing only an undergarment, then he was said to be “naked” or “stripped”. If one was wearing only an undergarment (tunic) and belt, they were said to be wearing a “loincloth”. 

 Mary (Jesus’ mother) was a teenager who was “promised” by her parents to be married to Joseph (at the time when Jesus was considered to be miraculously conceived). Following their marriage, and Jesus’ birth, Mary and Joseph had other children as well.