This is what I can find:
Pieter A.C. Teunissen, born 5 October 1933 and Marie L. Minkman, born 14 March 1935, travelled by the ship JOHAN VAN OLDENBARNEVELT departing in 1956 under Netherlands Australian Migration Agreement. Arrived on 17 may 1956.
And marriages out of the year 1956 are not public and birth records are only public before the year 1902.
Maybe the family has more information, about names, towns or dates.
Robert van Duurenwww.firstname.lastname@example.org