Agramahishi (Chief Queens) of first three Mauryan Emperors
Chandragupta Maurya -
1- Ragyi Durdhara (Belonged to Mauryan lineage and according to Mahavansh Tika daughter of Chandragupta's eldest maternal uncle, possibly adopted to make her suitable for Agramahishi as she was a commoner).
2- Bhavishya Purana says daughter of a Yavana king Suluva who ruled over Paursa was his next Agramahishi (possibly he was a normal Satrap of one of the north western satrapies)
Bindusara-
1- Janpad Kalyani Subhadhrangi or Dharma (Only in one source, maybe for a brief time and then lost favour)
2- Mother of Sushima (her name and origins are not known)
Ashoka
1- Vedisha Devi or Mahadevi willingly didn't accept being Agramahishi but she had title of Mahadevi to give honour to her sacrifices and support for Ashok when he was just a prince and gave him two illustrious and well learned children.
2- Agramahishi Asandhimitra - She was barren so she adopted Charumati, daughter of Ashok born from a concubine. Charumati was Ashok's favourite daughter and she cared for Ashok in her last days.
3- Agramahishi Tisyarakshita - An evil hearted lady who charmed Ashoka with her looks and dance. She saved Ashok from a disease so he made her Agramahishi. Some scholars calls Karuwaki and Tisyarakshita as same woman as both are called Dwitiya Devi. She blinded Kunala, Ashok's favourite son and crown prince.