Kaustubhodbhasitoraska (कौस्तुभोद्भासितोरस्क, IAST: Kaustubhodbhāsitoraska) is a Sanskrit-origin Hindu boy-name meaning “He whose chest blazes with the brilliance of the Kaustubha gem”. From kaustubha (the supreme jewel churned from the cosmic ocean), udbhāsita (illuminated, blazing forth, from ud + bhās meaning 'to shine upward'), and uraska (pertaining to the chest, from uras), this name exalts Viṣṇu whose broad chest is set radiant by the celestial Kaustubha gem he wears eternally.

Meaning, etymology & significance

The Kaustubha is described in the Purāṇas as the most magnificent jewel that emerged from the churning of the milk-ocean (Samudra Manthan), and Viṣṇu claimed it as his own ornament, wearing it upon his chest as a symbol of his supremacy over all wealth and all souls. Udbhāsita means 'made to blaze or shine brilliantly from within,' conveying that the gem does not merely decorate but actively illuminates the Lord's form. The compound thus depicts Viṣṇu as a figure of blazing, jewel-lit splendour—majestic and transcendent.

This elaborate compound epithet is used in liturgical stotra recitation and temple eulogies and is not typically given as a personal name due to its complexity. Devotees who meditate upon it visualise the Lord's luminous form, and the name is a doorway into that divine aesthetic contemplation known as divya-maṅgala-vigraha. Pronounced kow-stoo-BHODE-bhaa-si-tor-AS-ka.

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Scriptural source

Kaustubhodbhasitoraska appears in the Vishnu Sahasranama, among the sacred names of Vishnu.

Astrology — nakshatra, rashi & numerology

By the standard Vedic correspondence between a name’s first syllable and the lunar mansion, Kaustubhodbhasitoraska aligns with the Mrigashira nakshatra, under the Mithuna rashi (Moon sign). Its Chaldean name-number is 9.