Hi, Searched the Canada Census - for 1911 with 0 results -for both Surnames
Do you have the names of Parents -etc
Do you know what religion the family practiced - There may be baptismal records - as well Marriage records perhaps burials.
Public Library for Myrnam Alberta - may be able to assist - Perhaps search of City Directories etc - for the surnames - in the aprox 1926 time frame
Cemetery Offices
There are a number of Cemeteries listed for the Minburn location
http://www.prairiesouls.com/counties.php