Bottom left, partly behind column: St. James the Less (son of Mary Cleophas)

Right of James the Less: St. Anne seated beside Mary and Jesus

Behind Anne: St. Joachim (left), St. Joseph (right)

Bottom right: Possibly St. Elizabeth with the child John the Baptist

Behind Elizabeth, in red: Mary Cleophas, 2nd daughter of Anne

Behind Elizabeth, in black and white hat: Mary Salome, 3rd daughter of Anne

Children in the center: Saints Simon (behind, son of Mary Cleophas); James the Greater
(right) and John the Evangelist (left, with cup as his attribute), sons of Mary Salomé

Altar boy with candle snuffer: St. Jude Thaddeus, son of Mary Cleophas

Left and right of the altar: husbands of Anne and husbands of Mary Cleophas and Mary Salomé

Source:A blogger named Ben at Benexhale.com