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He was the eldest son of John Montgomery ( died 1733 ) of Ballyleck , County Monaghan ( Member of Parliament for Monaghan and second son of Colonel Alexander Montgomery ( 1667 – 1722 ) after succeeding his father to Ballyleck Estate when his elder brother Thomas Montgomery ( Politician ) was disinherited for marrying an Englishwoman ) .
 John Montgomery ( died 1733 ), Alexander Montgomery ( 1667 – 1722 ), Montgomery
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
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Answer:
 John Montgomery ( died 1733 ), Alexander Montgomery ( 1667 – 1722 ), Montgomery