I refer people to Kipling's poem, "When 'Omer Smote 'Is Bloomin' Lyre"

I will likewise mention that Alan Sherman was regularly sued by singers whose best known songs he had parodied. Harry Bellefonte, was, apparently, one of the first. Sherman parodied his song "Matilda" as "My Zelda". Afterwards, whenever Bellefonte sang "Matilda", someone in the audience would shout "Zelda". I can see why he wouldn't be happy about that.