Simon Francis Mann is a British mercenary and former officer in the SAS. He trained to be an officer at Sandhurst and was commissioned into the Scots Guards. He later became a member of the SAS. On leaving the military, he co-founded Sandline International with fellow ex-Scots Guards Colonel Tim Spicer in 1996. Sandline operated mostly in Angola and Sierra Leone, but a contract with the government of Papua New Guinea attracted a significant amount of negative publicity in what became known as the Sandline affair.

Francis George Mann, was an English cricketer, who played for Cambridge University, Middlesex and England. He was born at Byfleet, Surrey and died at Stockcross, Berkshire.