John Herald's "Jack Elliott" song is also on the "Bread and Roses Festival" album on Fantasy.In addition to "Ramblin' Jack and Mahan," that's already been mentioned, Guy Clark's "Cold Dog Soup" also mentions Jack. It's the title song of Guy's latest Sugar Hill album.
Christine Lavin has a song called "Ramblin' Waltz" on her "Future Fossils" album on Philo. It doesn't specifically name Jack, but it's obviously about him.
MIke Regenstreif