Has anyone heard of an apha stallion named MrRobinBoy if so where and is he alive? I believe I have a son.?

I have a 1996 breeding stock palomino that I think is an offspring sired by MrRobinBoy with an unknown mare. My horse was never registered since the breeder obviously wanted color. I believe all this took place in Southern California. I really would like to know who the mare was. My horse is awsome and does it all. I wouldn't trade him for a million bucks, just curious.