They aren't really Mario bros
Here's an interesting bit of trivia - Super Mario's creator Shigeru Miyamoto spoke in a recent interview and said Mario and Luigi don't have last names. This comes after decades of people insisting they are called Mario Mario and Luigi Mario, which is silly when you think about it.
"This is an old story, but Hollywood did a film version of the Mario Bros. many years back [don't remind us -ed]. There was a scene in the script where they needed a last name for the characters. Somebody suggested that, because they were the Mario Bros., their last name should be Mario. So, they made him "Mario Mario". I heard this and laughed rather loudly. Of course, this was ultimately included in the film. Based on the film, that's how their names ended up. But, just like Mickey Mouse doesn't really have a last name, Mario is really just Mario and Luigi is really just Luigi." - Shigeru Miyamoto
So that's the end of that.
3,029 news items
A day with Pokemon GO Down Under
Splatoon's Last Ever Splatfest is Coming
And It's Sister vs. Sister
Nintendo President Satoru Iwata Passes Away at 55
Rest In Peace
Nintendo has detailed the return of its World Championship
Do you have what it takes?
Disney Infinity 3.0 Edition Officially Revealed
The Force is strong with this one...
Rumor: Disney Infinity 3.0 Leaked Early
Straight from a Galaxy Far, Far Away...
Mario Kart 8 DLC Pack 2...OH YEAAAAH!
Nintendo should do this more.
The Nintendo GameCube: An Interesting Legacy
Will The Wii U Have a Similar Fate?
Project Ukulele - Possible Hint at Characters
Could it be?
Wii's World is not officially affiliated with Nintendo! (but they wish we were).