Only just found your question while looking up my family tree. David Hye/Hay Aaron was the father of my paternal grandmother Mozelle (Aaron) Saul. My source for the following information is a detailed family tree prepared by Benny Isaacs in 1979.
Hannah Solomon was the 2nd of 8 children (1. Isaac, 2. Hannah, 3. Diana, 4. Kelly, 5. Joe, 6. Ramah, 7. David, 8. Saul)
Hannah and David Hye/Hay Aaron had 7 children (1. Aaron, 2. Mozelle (my grandmother), 3. Carey, 4. Florence, 5. Rose or Ramah, 6. Edward, 7. Seemah)
For the children I have the following information -
1. Aaron - no issue 2. Mozelle m. Ezra Saul (my grandfather) 8 children (1. Mordecai, 2. Seemah, 3. Saul, 4. Meyer, 5. Hannah, 6. Rachel, 7. Reuben (my father), 8. Florence (I have lots more detail for this side of the family)) 3. Carey m. Moses Meyer - 3 childen (1. Hannah, 2. Rachel, 3. Charlie m. Florence Solomon (Hannah Solomon(his grandmother)'s brother (Kelly)'s daughter)) 4. Florence m. Arnold Joseph Ellis - 3 children (1. Joyce m. George Gillard, 2. Hyacinth m. Nissim Cuneo - 2 children (1. Stephanie, 2. Kim (son)), 3 Camille 5. Rose or Ramah m. Duarte - 1 child (Patricia) 6. Edward - changed name to Edward Hay m. Lily - 1 child (Richard) 7. Seemah - no issue
The Family tree I have branches out over 8 major arms, Hannah Solomon's parents - Mozelle and Ezekiel Solomon - represent 1 of the 8 arms.
There was a lot of intermarriage between the 8 arms so the tree is quite complex.
My father, Reuben (82 yrs), his brother, Saul (89 yrs) and 2 sisters Hannah (83 yrs, and named after Hannah Solomon) and Rachel (85 yrs) are well and living in Australia. Their sister Florence (77 yrs) lives in South Africa.
Hyacinth and Nissim Cuneo, and their children also live in Australia.
Well, this is a good start. Hope it helps you. Let me know if you need any other details. I would certainly be interested in anything you might have.