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After ordination as deacon in 1637 and as priest in 1638 , Thomas became vicar of Penbryn in Ceredigion and chaplain to Algernon Percy , 10th Earl of Northumberland .
 Penbryn, Ceredigion, Algernon Percy , 10th Earl of Northumberland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Penbryn, Ceredigion, Algernon Percy , 10th Earl of Northumberland