Hi Marie
Have searched the bdm's Vic, NSW, SA, WA and Qld for the birth of Ellen Veronica McENTEE with father Michael - nothing unfortunately.
This may be relevant info -
Marriage
McENTEE Michael 22 years Single Father Thomas McENTEE
WHITFORD Marlan 20 years Single Father Elijah WHITFORD
19 Apr 1885
At the Sacred Heart Church Kadina Dal 143/381
Birth - NSW [have listed again with reg#]
37294/1888
McENTEE Mary E
Father Michael Mother Marlan
District Broken Hill
Birth - SA
McENTEE William Augustin
5 Aug 1893
Father Michael McENTEE Mother Marlan WHITFORD
At Wallaroo Mines Dal 527/428
Births WA
McENTEE Francis
Father Michael Mother Marlan WHITFORD
District Coolgardie Reg#484 1901
McENTEE Irene May
Father Michael Mother Marlan WHITFORD
District Coolgardie Reg# 909 1903
I would say that Ellen's birth was not registered....with the constant moving perhaps it was overlooked.
If she was born at Wallaroo as was her brother William Augustin, then perhaps a search of the Parish registers may find her baptism.
I note are numerous McENTEE marriages in South Australia with father Michael indicating there may have been more unregistered births to this couple other than Ellen Veronica.
Death certs in SA only give number of issue not names.
McENTEE Michael
22 Jul 1932 aged 70 years Married No relative noted.
Lived and died at Colonel Light Gardens. Ade 540/279
However this death certificate in Western Australia should give you the names of their children.
McENTEE Marlan
District Perth Reg#355 1940
Buried at Karrakatta Anglican Cemetery aged 70 years.
There is a photo service on the website. Wonder if the names of her chn are on her headstone ie if there is a headstone.
http://www.mcb.wa.gov.au/NameSearch/photoServ.htmlCheers
Cando