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Knockdoe In the resulting Battle of Knockdoe , Ó Cellaigh fought on the side of Gerald FitzGerald , 8th Earl of Kildare , Lord Deputy of Ireland .
 Ó Cellaigh, Gerald FitzGerald , 8th Earl of Kildare
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ó Cellaigh, Gerald FitzGerald , 8th Earl of Kildare