Return of the Jedi question?

So I'm one of those people that likes to know just about everything about a certain subject. I'm curious that while Yoda really had no way of knowing whether he and Luke were really the last Jedi before he died, does anyone know (expanded universe included of course) if there were any other Jedi alive at that time besides Yoda and Luke Skywalker? I felt that while the Jedi had been annihilated pretty well, there had to be at least a handful left.