Crossword clue: what are the first names of the first father and son pair that were both prime ministers of canada

The most common answer is justin (6 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

justin 6 letters otdb

pierre 6 letters otdb

capital of the state of South Dakota; located in central South Dakota on the Missouri river