My mistake about Sukanya. While writing that, I was aware Sukanya is a female name so I had rechecked the text. I don't why I got confused, the text is pretty clear about Sukanya being wife of Chyavana and was Mother of Pramati.
Yes, Ruru and Pramadvara are both children of Apsaras. About three Drona story, wasn't Ghritachi flying in the Sky when Bharadwaj saw her?
About whether Pramadvara is dead or not, these are the words from BORI Critical English edition,
Someone whose mortal time on this earth has run out, cannot come back to life again. The miserly life has run out for this daughter of the gandharva and the apsara.
‘They addressed him in these words. “O Dharmaraja! If you so think, let Ruru’s beautiful bride Pramadvara, who is now dead, arise with half of Ruru’s life.”
It spells the name aas Sahasrapata, they always add an 'a' to all names at the end.
Also, in my previous post, all the passages that are in Italics have been copy pasted directed from Critical Edition.
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