Descendants of Jane Everett David Hamilton

I am looking for descendants of David Hamilton b. abt 1840 in Enniskillen Ireland and Jane Everett (my GG Aunt) b. 1844 in Hobart Town Tasmania. They married in Ballarat in 1871 living in Burrumbeet Victoria. David was a wheelwright. They were later living in Newcastle NSW around 1889 as they were both witnesses to my GG Grandfather's second marriage. I think they had two children, both appear to have been born in Victoria - Mary Jane and David John. I would love to hear from any descendants of these people! Thank you.