Did the name 'Mario Bros.' not get your attention? Yes they are.
There is Mario, Luigi, Yoshi, Peach, Bowzer and DK(not as popular).
There is no official answer, honestly. All we know is they are Mario and Luigi's "evil counterparts." well Mario and luigi are cousins and waluigi and luigi are brothers Mario and Luigi are brothers... and I highly doubt that Wario and Waluigi are cousins with Mario and Luigi.
Yes, Luigi is Mario's twin brother, in fact. Luigi is the "brother" in "Super Mario Brothers". They are called the "Super Mario Brothers" because Mario is the older twin, more popular than Luigi, and was introduced 2 years before Luigi in 1981.
Luigi and Mario are indeed brothers. Mario is the older brother and Luigi the younger brother.
the brothers are maroi and luigi
4. Mario luigi walugi wario
Mario's name is acutally Mario Mario as established in the Mario Brothers Movie, and in game titles in witch they refer to them as the Mario brothers. Them being Luigi Mario and Mario Mario.
Luigi
No, the creators of Mario, Luigi, Nintendo, and so forth, are all Asian. But yes Mario and Luigi are Italian.
Like any other baby. But if it's not that, then let's just say that anything in the Nintendo world happens.
No, the game New Super Mario Bros. 2 is for the Nintendo 3DS.You have, however, New Super Mario Bros. U and New Super Luigi U which are both for the Nintendo Wii U.
This answer comes in simple terms. They are the Mario Brothers. Therefore their last names are Mario. Seriously. That's it.