Namesakes
British Prime Ministers:
1 prime minister
Robert Gascoyne-Cecil 1885-1886; 1886-1892; 1895-1902 
Nobel Prize Winners:
1 peace
(peace) Robert Cecil 1937
Olympic Medalists:
1 gold/silver
(gold/silver) David Burghley (a.k.a. Cecil) 1928; 1932 400 m hurdles; 4x400 m relay