Napoleon Murphy Brock is an American singer, saxophonist and flute player who is best known for his work with Frank Zappa in the 1970s, including the albums Apostrophe ('), Roxy & Elsewhere, One Size Fits All, and Bongo Fury. He contributed notable vocal performances to the Zappa songs "Village of the Sun," "Cheepnis," and "Florentine Pogen."

Apostrophe (') is the sixth solo album and eighteenth in total by Frank Zappa, released in March 1974 in both stereo and quadraphonic formats. An edited version of its lead-off track, "Don't Eat the Yellow Snow", was the first of Zappa's three Billboard Top 100 hits, ultimately peaking at number 86. The album itself became the biggest commercial success of Zappa's career, reaching number 10 on the US Billboard 200.