Dont know if this will help you but heres Mary's Gen. also in laws were sometimes called brother or sister but because I find no relationship with either cloipas or Mary his wife mentioned anywhere else I dont think theres any relationship. but I do not read the verse quite that way you read it I read it as a pause after sister 19 Now there stood by the cross of Jesus his mother, and his mother's sister, (and also there was)Mary the wife of Cleophas, and Mary Magdalene......................Marys genealogy is in Luke 3:23- it is shown through her fatherMary was a direct descendant of King David which gave Jesus the right to ascend the Jewish throne, both through Mary and through adoption by his foster father, Joseph. Mary’s genealogy is supplied in Luke 3:23-38. Dr. Henry Morris explains the genealogy in Luke:“Joseph was clearly the son of Jacob (Matthew 1:16, so this verse [Luke 3:23 - says “son of Heli”] should be understood to mean “son-in-law of Heli.” Thus, the genealogy of Christ in Luke is actually the genealogy of Mary, while Matthew gives that of Joseph. Actually, the word “son” is not in the original, so it would be legitimate to supply either “son” or “son-in-law” in this context. Since Matthew and Luke clearly record much common material, it is certain that neither one could unknowingly incorporate such a flagrant apparent mistake as the wrong genealogy in his record. As it is, however, the two genealogies show that both parents were descendants of David—Joseph through Solomon (Matthew 1:7-15), thus inheriting the legal right to the throne of David, and Mary through Nathan (Luke 3:23-31), her line thus carrying the seed of David, since Solomon’s line had been refused the throne because of Jechoniah’s sin” [Dr. Henry M. Morris, The Defender’s Study Bible, note for Luke 3:23 (Iowa Falls, Iowa: World Publishing, Inc., 1995).]. Although Jesus was clearly legally related to both parents (to Mary, by being born from her, and to Joseph by legal adoption), was he genetically related to them or to his brothers and sisters?For thousands of years, every human child has been born with an inherited sin nature and sinful flesh (Romans 8:3). This is a result of our sinful first parents, Adam and Eve to whom we are all genetically related. Each generation (without exception) has sinned (Rom. 3:23) and passed on its sinful nature and the curse of death, to each succeeding generation (the biblical doctrine of imputation of sin - Romans 5:12-19). There is only one exception in history. Although Jesus grew in the womb of Mary, in the same manner as any baby, he was different from all other babies. It appears that he was not genetically related to either Mary or Joseph, for both had an inherited sin nature. Jesus was sinless, and one may reasonably assume without genetic flaw, since he was to serve as the spotless and sacrificial Lamb of God.Ever since the Creation, each subsequent life has been created at the moment of conception. Scientifically, the new entity begins at the moment the DNA of man and woman combine. This was not the case with Jesus. As a spirit and part of the Trinity, Jesus existed before the Creation of the world. In fact, John reveals that he is the Creator (John 1).Furthermore, the physical body of Jesus as born in Bethlehem was clearly a special creation of God, placed in Mary’s womb. This is the biblical doctrine of the Virgin Birth.Thus, neither Christ’s spirit nor his body must have resulted from the DNA of Mary’s egg or from any man’s sperm. Both would have contained inherited genetic defects and the sin nature. As Scripture tells us, Jesus was truly the Second Adam. The first Adam was a special creation of God (not related to any human being), and so was the second Adam (Romans 5:12-19). Jesus was just as fully human as the first Adam. And just like the first Adam, he had no sin nature, no inherited sin, no sinful flesh, which has always been passed from one generation to the next since Adam and Eve’s sin. He was absolutely pure and without sin—from the day he was born, till the day he died. He had to be—he was the Lamb of God, without blemish or spot, sacrificed for sins (John 1:29).also heres a link you might find helpful
http://www.complete-bible-genealogy.com/names/starting_a.htm