Marriage: 1271/1875 Edward MCKOY Grace MACKENZIE BALMAIN
Births:
3691/1876 Charles Edward MCKOY BALMAIN
3740/1878 Frances MCKOY BALMAIN
4504/1884 Alfred H MCKOY BALMAIN
Death:
2449/1878 Frances MCKOY BALMAIN
2639/1884 Edward MCKOY parents Patrick H and Mary A BALMAIN
Edward McKoy death notice:
http://nla.gov.au/nla.news-article13551883Edward Funeral notice:
http://nla.gov.au/nla.news-article13545783You say that Grace Jnr was raised by an aunt. What about Charles and Edward? I can't see deaths for them with parents Edward and Grace.
I can't find births/deaths for Alice and Minnie. Do you have more information on them?
Jamjar
ADDED
QLD deaths:
1941 C4218 Alfred Herbert McKoy Edward Grace MacKenzie
1945 C3251 Charles Edward McKoy Edward Grace McKenzie
Obit for Alfred Herbert in QLD, mentions Charles and sisters' married names. Bottom of 5th column:
http://nla.gov.au/nla.news-article42324117Buried Babinda Cemetery
A H McKoy
Burial Date: 20 Dec 1941
Cemetery: Babinda Cemetery
Section: MON
Row: L
Site: 1
You can view Alfred's WW1 record under name Herbert McKoy:
https://recordsearch.naa.gov.au/SearchNRetrieve/Interface/ViewImage.aspx?B=1951759Charles Edward death notice:
http://nla.gov.au/nla.news-article81423234Thinking this may be your Alice's marriage and death:
5584/1903 John WILLIAMSON to Mary A MCKOY BALMAIN SOUTH
1729/1950 Mary Alice WILLIAMSON parents Edward and Grace DRUMMOYNE
Death for a Roy and death notice mentions a wife Minnie:
5167/1925 Roy MCKEOWN parents John and Ellen REDFERN
http://nla.gov.au/nla.news-article16220881Possible marriages?:
3905/1908 Wilson SINCLAIR to Minnie E MCKOY SYDNEY
7154/1918 Edward H LACEY to Minnie E Sinclair SYDNEY
5138/1922 Roy MCKEOWN to Minnie LACEY SYDNEY
Death?: 16743/1952 Minnie Edith MCKEOWN 67 YRS DRUMMOYNE BURWOOD
Death and Funeral notices, 2nd and 5th column:
http://nla.gov.au/nla.news-article18278965