I spent 64-65 in Steinbach which was grade 9. Got a crapload of cousins still there. Reimers and Barkmans plus the usual other mennonite names. Not sure if I have any relatives in Altona unless they're further removed.
My great Grandfather has a good mennonite name as well and was mayor of Steinbach between 1884 and 1912 with a 3 year break in there somewhere.
Johann G. Barkman