Wilhelmina Watkins is Joseph's daughter with his first wife Sarah McGrath who he married in 1856. Sarah died when Wilhelmina was a baby. Joseph married Elizabeth in 1861 in Sydney, they had Harriet and Joseph in 1862 they were twins. Joseph died when there next son William was a baby. They had another two daughters Isabella and Elizabeth and finally a son Robert. Harriet and Isabella didn't have their mother's name on the death certificate. William, Robert and Elizabeth had both parents names on death certificate. Elizabeth may have been known as Eliza as well. On Williams death certificate it said Joseph and Eliza as his parents. If I could find a marriage for William that could help me . Robert married in More in 1920, not sure if Elizabeth would have been alive then but it is possible.