John F. 'Jack' Hasey was born in 1916.
John F. 'Jack' Hasey died in 2005.
John F. - Jack - Gordon was born in 1921.
No, it was John. Jack is a somewhat common nickname for John.
John F. - Jack - Gordon died in 2010.
Formally he's referred to as John F. Kennedy or sometimes John Kennedy; his friends and family called him Jack, so he was known to some as Jack Kennedy. But he is only very rarely referred to as Jack F. Kennedy. The most common names are President Kennedy, John F. Kennedy and JFK.
John F. Kennedy was nicknamed Jack. If John Tyler, John Adams, or John Quincy Adams was called Jack, it's not obvious.
John Fitzgerald Kennedy (official name) was called Jack Kennedy (nickname) by his family and friends. Jack is a common nickname for John.
John F. Deane was born in 1943.
John F. Kennedy was often called "Jack"/
Jack F. T. Ryan was born on 1916-02-03.
Jack.
JACK