The title of this article is a conjectural. Though the topic is found within The Simpsons universe, a proper name is not available.
The Wizard Twins are characters in the Angelica Button fantasy book series by T. R. Francis that are linked together, making it look like they have two heads.
Angelica Button tried to warn the Merlinical Council in front of Lord Evilton, but no one believed her and she was sent to Mount Krushmore.
Terri and Sherri once dressed a costume of the Wizard Twins.
Behind the laughter
The Wizard Twins are parodies of Professor McGonagall off of the Harry Potter series, however Professor McGonagall is one person, not two.