I seriously doubt the Percy Miller connection. AlphaGo is the best player in the world, so a name like Master fits it :) They also probably didn't want to cho

I seriously doubt the Percy Miller connection. AlphaGo is the best player in the world, so a name like Master fits it :) They also probably didn't want to choose a human looking name which could mislead people, and instead chose one which could presumably be either of a human or an AI.