Chisum, of Latin origin, means "to cultivate" or "to till the earth". It was traditionally used as a surname but has been adopted as a given name in recent times. The name Chisum is often associated with the American Old West due to its use by lawmen and outlaws alike during that era, most notably by Pat Garrett's nemesis Billy the Kid's real name Henry McCarty alias William H. Bonney also known as "Kid Antrim" or "Kid Chisholm".
"The name Chisum experienced varying popularity over the decades, with a peak of 12 births in 2013 and notable increases from 2017 onwards."