As Canadians and lovers of hockey, we have our Sutters and Staals, extraordinary stories of prolific sporting families. Once upon a time, Bobby and Dennis Hull were among the stars of the NHL, as were Phil and Tony Esposito.
But when it comes to sheer accomplishment, its pretty hard to top the Manning clan of New Orleans and the Williams family of Compton, California.
On Sunday, Eli Manning steered the New York Football Giants to victory over the Green Bay Packers on what truly was the frozen tundra of Lambeau Field. His brother, Peyton, guided the Indianapolis Colts to last year's Super Bowl, meaning Archie Manning's boys have quarterbacked back-to-back Super Bowl entrants.
In a world where every parent thinks their kid is going to the big time, that's pretty amazing for two brothers, both of whom have had plenty of doubters along the way.
But even that story, really, takes second place to the tale of Venus and Serena Williams, both of whom were still alive in the Australian Open as of today.
The Manning boys had their dad to teach them how to be NFL quarterbacks. The Williams girls just had their father, Richard, and his crazy dream that two ghetto girls could be tennis champions.
Yet both did it, and both are multiple Grand Slam champions, and they may be headed for another of their improbable sister vs. sister matchups in the Aussie Open finals.
(Ed. Note: That possibility ended when Serena was upset in straight sets by Serbia's Jelena Jankovic in the quarterfinals on Monday night Down Under).
Venus is surely the best grass court player of her generation, and there's an argument to be made that the oft-injured Serena could be the best ever to play the game.
The Mannings have pulled off an amazing double. But love 'em or hate 'em, the Williams sisters remain the most incredible family story in North American sports history.