terrena on Family Tree Circles

i am looking for the children of donald allan bruhne (also known as sherlock) and krystina teresa martys (know as tina)we only know there names are daniel and trevor and that they were born in carlton royal womans hospital we also know that daniel was 3 and trevor was 18 months when there father died in a motor car accident on the 23rd of november 1979.The last place we know that they were living is in tasminia with krystinas family. i am looking for them on behalf of my mother judith ann lillian bruhne clarke as donald was her brother and she would like to get in contact with both of the boys and with krystinas family.