[1] Designations are made by the Minister of the Environment on the recommendation of the Historic Sites and Monuments Board of Canada.
[2] Parks Canada administers the program, and installs and maintains the federal plaques commonly erected to commemorate each person, usually placed at a site closely associated with them.
[3] Events, Sites, and Persons are each typically marked by a federal plaque, but the markers do not indicate which designation a subject has been given.
The cairn and plaque to John McDonell (Aberchalder) does not refer to a National Historic Person, but is erected because his home, Glengarry House, is a National Historic Site.
The searchable database provided by Parks Canada[7] returns 732 records, and may not be up to date.