William Henry Sartorius appears there in two homestead entries. I've never seen or used Alberta homestead records and am thinking about getting his homestead papers for an upcoming issue of Casefile Clues.
As a note: This petition does not indicate the relationship of any of the "notifiees" to the deceased of the probate of the will. These individuals were named in Trientje's will and not necessarily related to her. In this case they were. The last three listed were grandchildren of Trientje, children of a daughter who pre-deceased her. Others listed were her children.