Daniel Rutherford
Daniel Rutherford (3 November 1749 – 15 December 1819) was a Scottish physician, chemist and botanist who is most famous for the isolation of nitrogen in 1772.
Daniel R. Fitzpatrick
Daniel Robert Fitzpatrick (March 5, 1891 – May 18, 1969) was a two-time Pulitzer Prize winner and an editorial cartoonist for the "St. Louis Dispatch" from 1913 to 1958.