User blog comment:BobTheDoctor27/Team of Heroes Base/@comment-1836439-20100323191345

Hmm...

User:MasterToa

User:Matoro1

User:Mazeka369

User:Mata Nui

User:MarioGalaxy2433g5

And if you count second names.

User: Bara Magna

User: Toa Makao

So eight people have Ma in their name.