Hi,
The Master Surname Index (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists these possible names;
Rosa LUST, died 1917, nee DUFLOTH, married Frederick 1910, buried in Josefburg Baptist cemetery, Irvine.
Frederick LUST, 1883 - 16 Aug 1955, wife Ottilia.
Ottilia LUST, 1895 - 18 Apr 1974.
Buried next to each other in the Hillside cemetery in Medicine Hat.
http://abgensoc.ca/Peter