Your Grandparents were most likely DP's/Displaced People emigrating from Germany.
<DPs" came to Canada primarily either under the sponsored labour scheme, which required them to sign a contract guaranteeing that they would remain employed in farming, mining, domestic service, railway work, or other forms of manual labour for a period of two years; or, under the close relative scheme, which enabled Canadian citizens to sponsor their close relatives stranded in Europe. Between 1947 and 1952 female "DPs" could come to Canada only as domestic contract workers.>
The Peopling of Canada: 1946 - 1976
http://www.ucalgary.ca/applied_histo.../chapter1.html
This is a must read for anyone w/Canadian Ukrainian DP Heritage. Not available online.
Lubomyr Y. Luciuk: Searching For Place - Ukrainian Displaced Persons, Canada, and the Migration of Memory
http://www.infoukes.com/bookstore/lu...for_place.html
World War II in Ukraine
http://www.infoukes.com/history/ww2/
Ukrainian History: Chronological Table
http://ukraine.uazone.net/history.html
PS>Above links were provided to help w/historical perspective. Will organize something for u in the way of genealogy in the next few days.