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J. K. Simmons (born 1955), American actor •
James Kenneth Stephen (1859–1892), English poet and tutor to Prince Albert Victor •
JKS (director), an Indian film director •
Makoto Saitō (wrestler) (born 1974; also Jimmy K-ness J.K.S.), a Japanese professional wrestler for Dragon Gate •
Jaron-Keawe Sagapolutele (born 2006), American college football quarterback ==Other uses==