Aunt Maria

Aunt Maria is an aunt of Mario and Luigi's who was briefly mentioned by Luigi in The Adventures of Super Mario Bros. 3 episode "Crimes R Us".

While Mario and Luigi were looking at clouds, Luigi noticed that one cloud in particular resembled their Aunt Maria. However, the cloud looked nothing like a human. An Aunt Maria was also mentioned in the book Doors to Doom, where Donkey Kong Jr.'s yell is compared to a cross between Tarzan's and the screech Aunt Maria makes when the Mario Bros. walk on her newly waxed floor.

It's possible that Aunt Maria is the namesake of Mario, due to the similarities of their names.