How many suicides have been in the Hemingway family?

I counted 5.

The father - Clarence.
His children - Ernest, Ursula and Leicester.
and Ernest Hemingway's grandaughter, Margaux.

http://www.todayinliterature.com/stories.asp?Event_Date=7/2/1961

5 total suicide, but numerous attempts. Started with Ernest Hall, who attempted suicide; however his son-in-law took the bullets out of the gun. When Ernest pulled the trigger, the gun was empty. His son-in-law was Ed Hemingway. Ed Hemingway shot himself in the head. He left six children, three of which killed themselves. Leicester, Ursula, and Ernest Hemingway all killed themselves. Years later, Margeaux Hemingway, a famous fashion model/actress and sister to Mariel Hemingway also killed herself.

https://en.wikipedia.org/wiki/Ernest_Hemingway#Early_life