You would say "...is preceded..." if you note that fact at the person's time of death. "Was preceded" is how the obituary would be worded because it was written after the person's death. Both deaths would have happened in the past.
They are talking about the deceased and their relationship to the remaining surviving family members. (e.g.: John was "preceded in death" by his wife Joan.) In the example, Joan preceded John in death.
Hamnet
I think you mean "preceded in death" which means "died before" .
Oliver Cromwell's death
He probably gave a little cough and then died.
Only if preceded by extreme blunt trauma or the headache is from hemorrhaging.
Shakespeare's only son, Hamnet, predeceased him.
The medieval plague of the black death greatly preceded the discovery of penicillin. No antibiotics, or any other effective treatments, were used to treat the black death.
The movie 'Death Wish 3', directed by Michael winner, was released on November 1, 1985. This movie starring Charles Bronson was preceded by 'Death Wish 2' and 'Death Wish' and is about a vigilant killer.
Zachary Taylor was the President before Fillmore. The death of Taylor in office made Vice-President Fillmore the President.
The Wilhelm Scream, Take 2
Herbert Hoover preceded Franklin Roosevelt.