Patsy Bruce was a country music songwriter who co-wrote “Mammas Don’t Let Your Babies Grow Up to Be Cowboys” with her then-husband, Ed Bruce (1949–2021).Bruce and her husband co-wrote “Mammas Don’t Let Your Babies Grow Up to Be Cowboys” in 1975. She was responsible for the song’s iconic title: Ed had been working on a song called “Mammas Don’t Let Your Babies Grow Up to Be Guitar Players,” when Patsy suggested a tweak that made it work.