Below is the death record of a Thomas Donaghue (Spelling) who is married to a Grace Hockett. So the spelling is different for both.
A second record is on the LDS site with the correct spelling of his name, but Grace's last name is still wrong.
He did die early. Maybe someone can get access to the actual copy of the record to see if this might be his father.
Thomas L. Donaghue
Rhode Island, Deaths and Burials
Name: Thomas L. Donaghue
Death Date: 09 Apr 1911
Death Place: Woonsocket, Providence, Rhode Island
Birth Date: 1888
Marital Status: Married
Spouse's Name: Grace Hockett
Father's Name: John Donaghen
Mother's Name: Mary Loyden Donaghen
Indexing Project (Batch) Number: I09363-2 , System Origin: Rhode Island-EASy , GS Film number: 1906753 , Reference ID: p 283
"Rhode Island, Deaths and Burials, 1802-1950," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F86X-DKZ
: accessed 28 July 2015), Thomas L. Donaghue, 09 Apr 1911; citing Woonsocket, Providence, Rhode Island, reference p 283; FHL microfilm 1,906,753.