WikipediaIn their career, the British rock band Led Zeppelin recorded many songs that consisted, in whole or part, of pre-existing songs, melodies, or lyrics. They sometimes credited those sources, sometimes not. The band has been sued a number of times over attribution, some cases having concluded with others being awarded writing credit for the song in question.
https://en.wikipedia.org/wiki/List_of_Led_Zeppelin_songs_written_or_inspired_by_others[https://en.m.wikipedia.org/wiki/List_of_Led_Zeppelin_songs_written_or_inspired_by_others]