There are so many! I've noticed musicians recording a composition under different names at different sessions. I think Johnny Griffin's "Purple Shades" is an example, but I'm too lazy to seek out the other version(s). Then there are tunes/riffs which seem to be common property - Hawkins's "Stuffy" and Monk's "Hackensack" are examples IIRC. Stitt's "The Eternal Triangle" has quite a lineage, too.