Garlick Burns Hardefeldt Maryborough Vic Aus

Hi All,
I'm looking for any information on these family's, my grandparents Victor & Marie Hardefeldt have recently passed and i was given all the family photos but my nan did not like to discuss the past so i know very little, I'm very interested in knowing if Hardefeldt is German or Dutch all i was told during the war it was changed from Von Hardefeldt to just Hardefeldt. I have plenty of photos don't know who they are and one of the old grave place cards for Florence Amelia May GARLICK.
anything would be of great help

cheers Amy