Gargi II was the daughter of sage Vachaknu and thus called Vachaknavi

Gargi was the daughter of sage Vachaknu and thus called Vachaknavi. Gargi appears to have been a more accomplished scholar, who questions Yajnavalkya at great length upon the origin of all existence, until the great sage, perturbed by her questionings, exclaims: ‘Ask not too much, Gargi so that thy head may not fall off thy body. Truly, concerning divinity, one must not ask too much. Thou dost ask too much, Gargi; ask not too much.’ Thus silenced, she was, however, not subdued. Again, in an assembly of sages, she seeks permission to ask two questions of the famous teacher, adding: ‘Should he answer those, none of you can ever beat him in describing Brahman.’ She then advances towards Yajnavalkya fearlessly with the words: ‘As a hero’s son from Benaras or from Videha strings the slackened bow and arises with two foe-piercing arrows in his hand, so I confront you with two questions. Answer me these.’ At the end of the highly philosophical dispute, she aclnowledges her defeat and very generously declares to the assembled sages: ‘You should consider yourselves fortunate if you can get away from him with a salutation; never shall any of you beat him in describing Brahman.
Swami Vivekananda about Gargi: ‘Do you remember how Yajnavalkya was questioned at the Court of King Janaka? His principal examiner was Vachaknavi, the maiden orator — brahmavadini, as the word of the day was. ‘Like two shining arrows in the hand of the skilled archer’, she says, ‘are my questions.’ Her sex is not even commented upon.’