As i lay trying to sleep last nite, an idea popped in my head. I think I may have stumbled upon how they came up with George's last name. Probably not, but it works out anyway. Consider the trigonometric functions Sine, Cosine, and Tangent. Sine is already used in Jerry's last name, so maybe they thought of that and came up with George's last name. Cos-Tan-za. I know it's really stupid and crazy, but you never know.. :)
tim