Usha is from the Sanskrit uṣas (dawn). Usha in Hindu mythology — the Hindu goddess of dawn; daughter of Dyaus (sky god); sister of the night goddess Ratri; appears throughout the Rigveda — Usha Sukta (Rigveda 1.48 and 1.92) hymns celebrate her arrival as the renewing principle of creation; one of the most-celebrated cosmological figures in Vedic Hinduism; cognate with the Greek Eos and Roman Aurora; one of the Indo-European feminine divinities. Usha Nadkarni — Indian Marathi actress.
Usha does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Usha reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.