Op. 2 No. 1 (F minor)
Op. 2 No. 3 (C major)
Op. 101 (A major)
Well, yes, the Pastoral has a name and all, but I think its symphony namesake is more popular than the piano sonata. I don't think the latter is nearly as "famous" as the other sonatas with names. In fact, I think Op. 10 No. 3 is more famous than the Pastoral.