Dictionary of Selected Welsh Biographies, 1011-1969 has been added to Ancestry as a Web database.
The original, at the National Library of Wales (https://biography.wales/), has “over 5,000 concise biographies of individuals who made a significant contribution to national life, whether in Wales or more widely.”
Searching with Free Text at the NLW site for Canada surfaces 74 people, 63 males and 10 females. Canadian yields 15.
David Thompson (1770-1857) is the only one I immediately recognized.