Hnoss is from the Old Norse Hnoss — treasure, precious jewel. Hnoss is one of the Norse feminine names — central to traditional Norse mythological + Viking heritage. 1220, Gylfaginning 35) where the name Hnoss is poetic kenning for treasure.
Hnoss 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 Hnoss reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.