Breindel is from the Yiddish ברײַנדל — broin (brown) + -del (diminutive) — little brown one. Breindel is one of the Yiddish feminine diminutives — central to traditional Ashkenazi Jewish heritage across Eastern Europe (Poland, Lithuania, Belarus, Ukraine, Russia, and Hungary). Often a nickname for Bruria or Bracha. The name appears throughout Yiddish folk literature including the works of I. L.
Breindel 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 Breindel reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.