a Rishi who is very great in his spirituality(great seer), who had reached a 
certain level towards his goal(path).

 a King who is so spiritual that he becomes a Rishi. 

 a Rishi dwelling in the heavenly regions or a deva who is also a Rishi. The sons of Dharma or Yoga, divine or godlike sage. 

 a Rishi who has seen the Supreme Spiritual Truth and who were the founders of gotras of Brahmans or caste-races.