Shatardhayu (शतार्धायुष्, IAST: Śatārdhāyuṣ) is a Sanskrit-origin Hindu boy-name meaning “He whose lifespan is half of a hundred (fifty)”. From śata (hundred), ardha (half), and āyus (lifespan or vital energy), this unusual epithet of Vishnu may allude to a cosmological or mythological context in which the Lord manifests with a specifically measured divine lifespan.

Meaning, etymology & significance

The compound śatārdha-āyus literally yields 'one whose age is fifty,' which in a cosmological reading likely refers to a specific cycle or manifestation of Vishnu within a larger time-framework described in Puranic literature. The word āyus also carries the connotation of vitality and life-force, enriching the name beyond mere chronology.

This rare epithet invites scholarly attention and is best understood in its liturgical context rather than as a straightforward biographical detail. Pronounced śa-tār-dhā-yuṣ, the anusvāra and visarga lend it a distinctly Vedic sonic character, making it unusual as a modern given name.

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Scriptural source

Shatardhayu 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, Shatardhayu aligns with the Hasta nakshatra, under the Kanya rashi (Moon sign). Its Chaldean name-number is 6.