John Keats (1795–1821) was an English poet.
According to Data, he was known for his odes to people which had a big impact on his life. (TNG: "Schisms")
Sometime prior to 2368, William T. Riker had received a bound copy of Keats' poem Ode to Psyche as a gift from Deanna Troi. (TNG: "Conundrum")
In 2372, Jake Sisko learned that Keats was helped in writing his works by Onaya, an entity who fed on his neural energy. This eventually killed him. (DS9: "The Muse")