king Vṛṣaṇaśva is mentioned in Rig-Veda mandala 1- Sukta 51-Mantra 13.Indra once took birth as a daughter of Vṛṣaṇaśva and her name was Mena.
As you requested , below are the three translations of the mantra where the king Vṛṣaṇaśva is mentioned in Rig-Veda.
Translation By H.H.Wilson
अददा अर्भां महते वचस्यवे कक्षीवते वृचयामिन्द्र सुन्वते |
वृषणश्वस्य सुक्रतो विश्वेत्ता ते सवनेषु प्रवाच्या ||13 ||
adadā arbhāṃ mahate vacasyave kakṣīvate vṛcayāmindra sunvate |
menābhavo vṛṣaṇaśvasya sukrato viśvet tā te savaneṣu pravācyā ||
Thou hast given Indra , the youthful Vrichayato the aged kakshivat
praising thee,and offering libations. Thou Sukrutu ,wast Mena , the
daughter of Vrishanashwa. All these thy deeds are to be recited by
Here is translation of Ralph Griffith
13 To old Kakṣīvān, Soma-presser, skilled in song, O Indra, thou didst
give the youthful Vṛcayā. Thou, very wise, wast Menā, Vrsanśva's
child: those deeds of thine must all be told at Soma feasts.
And here is Hindi translation by Shree Ram Sharma Acharya of AWGP