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The province had its origin in the kingdom controlled by Donnus , ruler of the local Ligurian tribes of the area in the middle of the 1st century BC , and was named after his son and successor Cottius , whose realm was integrated into the Roman imperial system under Augustus .
 Donnus, Cottius, Augustus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Donnus, Cottius, Augustus