Mahabharata 5.193.60

ज्येष्ठा काशिपतेः कन्या अम्बा नामेति विश्रुताद्रुपदस्य कुले जाता शिखण्डी भरतर्षभ

jyeṣṭhā kāśipateḥ kanyā ambā nāmeti viśrutādrupadasya kule jātā śikhaṇḍī bharatarṣabha

Our plain-language meaning of this verse is waiting for scholar review.