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Attila 's father Mundzuk was the brother of kings Octar and Ruga , who reigned jointly over the Hunnic empire in the early fifth century .
 Attila, Mundzuk, Octar, Ruga
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Attila, Mundzuk, Octar, Ruga