The closest I can find to a Francis Leo Romain:
There was an arrival into Sydney in 1883 aboard the Ellora, assisted passengers.
Francis Romain, 25 (Francis William Romain)
Emily, 23 (Emily Kate Naish)
William, 3
Ethel, 1 (died aboard ship)
Herbert, infant
They seem to have had another child (Arthur) in 1886, Newton, NSW, but possibly they are the ones who head from Victoria towards London in 1889 - Mr Romain, 31, Mrs, 28, children 8, 5, and an infant - I can see marriages for their children back in the UK.
Who witnessed Francis' marriage in 1912?