In addition to being the "G" of G. W. Peck (as pointed out by Richard Stanley earlier), Ron Graham also published "On properties of a well-known graph or What is your Ramsey number?" as Tom Odda, a member of the Department of Mathematics from Xanadu University.
Apparently the name was chosen because if said quickly it sounded like the Chinese expression 他妈的 pronounced "ta ma de", a not so polite phrase in Chinese!