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He was the fifth and youngest son of John Trevor of Trevalyn , Denbighshire , and the younger brother of Richard Trevor , John Trevor and Sackville Trevor .
 Trevor, Richard Trevor, John Trevor, Sackville Trevor
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Trevor, Richard Trevor, John Trevor, Sackville Trevor