- Mar 9 Henry Rich, 1st Earl of Holland, English soldier, executed at 58
- Mar 9 James Hamilton, 1st Duke of Hamilton, Scottish statesman, dies at 42
- Mar 16 Jean de Brébeuf, French Jesuit missionary and saint (mission with Huron people, published first French into Huron translation), tortured and killed by Iroquois in New France at 55
John Winthrop (1588-1649)
Mar 26 English Puritan lawyer and 1st governor of the Massachusetts Bay Colony, dies at 61
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning