Achille Delaere was a Flemish priest who served on the Canadian prairies. He was one of the founders and organizers of the Ukrainian Catholic Church, with the Byzantine-Ukrainian rite, for Ukrainian immigrants in Canada.

Stefan Ustvolsky was a Russian Orthodox priest excommunicated from the Most Holy Synod in Saint Petersburg and pretend bishop in early Ukrainian Canadian history. He called himself Bishop Seraphim, Metropolitan of the Orthodox Russian Church for the whole of America and started the All-Russian Patriarchal Orthodox Church in 1903 in Winnipeg. His claim of consecration was backed by forged documentation and the church eventually fell apart around 1908.