13th Century Cowboy, also known as “Cowboy”, is an alternative rock incelcore artist. He was best known for his tracks, Chemtrails and Marcus Aurelius, and was featured on the albums, The Manson Family Murder Tapes, MSG Vol. 4 and Targeted Individuals.

His online presence largely centred around a Discord server he owned and ran, called “/ICG/” or “Incelcore General”, previously known as “spergbin”. The server acted as a community hub for artists in the scene to share their music and talk to fans, as well as shitpost and spam. At its peak, the server had over 1,000 members.