Biret is from the Sami (Saami) Biret — Sami Indigenous rendition of Birgitta / Bridget. Biret is one of the Sami feminine names — central to traditional Sami Indigenous Uralic heritage of Sápmi (Sami homeland spanning northern Norway + Sweden + Finland + Kola Peninsula Russia, ~70,000-100,000 Sami people). Sami feminine name reflecting Indigenous Sápmi heritage.
Biret 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 Biret reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.