Odo

Odo
Not much is known about Odo but he has been mentioned in songs twice. The first time, in Half Blood Prince, Hagrid and Professor Slughorn were drunk right after Aragogs funeral and it was about him dying. The second was at Bill and Fluer's wedding in Deathly Hallows which was about the great things he did. Odo must have been a famous wizard to have so many songs written after him.