You can find the Calgary cemeteries here,http://www.afhs.ab.ca/data/cemeteries/search.php
The Master Surname Database (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists these names;
David True RIVINIUS, 1909 - 8 Mar 1948
burial in Cartairs cemetery.
Daniel RIVINIUS, 9 Mar 1918 - 25 Dec 1928
burial in New Bergthal Menn Cemetery, Carstairs.
For further research please contact the Research Committee of the Edmonton Branch.http://abgensoc.ca/