An international investigation found the plane was downed by a Russian-made Buk surface-to-air missile, believed to have been fired by pro-Russia separatists.
All 298 people on board were killed, including 38 Australian residents and citizens.
Among the dead were the couple's children Mo, whose 14th birthday was on May 7, Evie, who would have been 12 next week and Otis who would have turned 10 next month.
Their grandfather Nick Norris, 68, was also killed.
The children were returning home to Perth for school while their parents stayed behind in Amsterdam.
"We will continue to love all four of our children equally. Violet brings some hope and joy for us. We hope she brings hope and joy for you too," the couple said in their statement released through the Department of Foreign Affairs and Trade.
- AAP