The Chinese Zodiac is based on the year of birth, and not the month.
R. Kelly was born on January 8, 1967.
A. R. Rahman was born on January 6, 1966.
R. A. Salvatore was born on January 20, 1959.
William R Harvey was born on January 29,1941
Mark R. Hughes was born on January 1, 1956.
Richard R. Schrock was born on January 4, 1945.
R. Norris Williams was born on January 29, 1891.
Timothy R. Ferguson was born on January 22, 1955.
Thomas R. Carper was born on January 23, 1947.
Robert R. Hitt was born on January 16, 1834.
Ray R. Irani was born on January 15th, 1935.
R. C. Lehmann was born on January 3, 1856.