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His father 's first wife was Miss Catharine Willoughby , daughter of Colonel Hugh Willoughby of Carrow , County Fermanagh in 1746 , by whom he had Nathaniel 's half-brothers Colonel John Montgomery ( 1747 – 1797 ) ( Member of Parliament for County Monaghan .
 Nathaniel, John Montgomery ( 1747 – 1797 )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Nathaniel, John Montgomery ( 1747 – 1797 )