 Although Keats and his family seem to have marked his birthday on 29 October, baptism records give the date as the 31st.He was the eldest of four surviving children; his younger siblings were George (1797–1841), Thomas (1799–1818), and Frances Mary "Fanny" (1803–1889) who eventually married Spanish author Valentín Llanos Gutiérrez.Another son was lost in infancy.