For most people trained in Carnatic Music, he is just Oothukadu. For some, Oothukadu Bhagavathar. Very few identify him as Oothukadu Venkata Subbaiyer. And yet, if you have been in the South and heard any music at all, you have definitely heard "Alaipayuthe Kanna".. (I hope the connection is obvious- he was the composer.)
I started off this post to include some of my favorite Old Tamil Songs (Senthamizh Thenmozhiyal, Kannum Kannum Kalandhu and so on), but decided that "Maraindhirundhe Paarkum" deserves a separate post for itself.