Simple past tense and past participle of predecease.(verb)
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Use "predeceased" in a sentence
"The FBI points out that Don Heathfield "predeceased" his father, Howard, a Royal Canadian"
"Although the club was formed only after the 1970 death of Jim Hendrix, it has grown to include those who qualify for membership and who predeceased him, if they died at the age of 27."
"He was predeceased by his brother, the actor Peter Graves Mission: Impossible."