Relationship of Salome and Mary

Mary is the mother of Jesus. Salome is mentioned twice in Scripture. >There were also women looking on afar off: among whom was Mary Magdalene, and Mary the mother of James the less and of Joses, and Salome; Mark 15:40 >And when the sabbath was past, Mary Magdalene, and Mary the mother of James, and Salome, G4539 had bought sweet spices, that they might come and anoint him. Mark 16:1 Even though she is only mentioned twice, it appears the assumption is Salome is Mary's sister. >Σαλώμη (Hebrew 'peaceful'), Σαλωμης, ἡ, Salome, the wife of Zebedee, and the mother of the apostles James the elder and John: Mark 15:40; Mark 16:1. Thayers Here is one explanation of the relationship by comparing gospel accounts at the cross. >We further notice that, the name of the Virgin-Mother being omitted, the other three are the same as mentioned by St. John; only, Mary of Clopas is now described as ‘the mother of James and Jose,’6124 and Christ’s Mother’s Sister’ as ‘Solome’6125 and ‘the mother of Zebedee’s children.’6126 Thus Salome, the wife of Zebedee and St. John’s mother, was the sister of the Virgin, and the beloved disciple the cousin (on the mother’s side) of Jesus, and the nephew of the Virgin. This also helps to explain why the care of the Mother had been entrusted to him. -source- So, were Mary and Salome sisters? What would a denomination (Catholic, Orthodox, Protestant) survey say? PS. As a bit of background, some will say that Elizabeth (mother of John the Baptist) and Mary were either sisters or cousins (related somehow by blood). Perhaps then, another question to ponder, whether Elizabeth, Mary, and Salome were all blood sisters.