Sundas (سندس) is an Urdu name meaning “fine silk”. Arabic — the delicate silk brocade described in the Qur'an as the dress of paradise.
Sundas 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.
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In Pythagorean numerology the letters of Sundas reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.