A square is a shape, like a circle, and 'square' is an old slang term for unaware. It was an attempt at jocularity.
Enjoy the explanatory video
Erm, wat?
It's Zoey, Omar, Tony, Thomas, Fiona, Felix, Sharon, Sonya, Edward, Nina, Zomar, Marmar, Tomar, Thomar, Fiomar, Femar, Shamar, Sonmar, Edmar, Nimar, Zony, Ony and so on.
So Tony^Edward = Shalixy