7941
Two of his descendants , Pei Yin ( 裴駰 ) and Pei Ziye ( 裴子野 ) , were also well known historians .
 Pei, Pei
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pei, Pei