Bernadette is the French feminine diminutive of Bernard — from the Old Germanic bern (bear) + hardu (brave, strong). Lourdes has become the most-visited Catholic pilgrimage site in the world — approximately 6 million pilgrims annually seeking the miraculous spring water. Bernadette's incorrupt body remains on display in Nevers, France.
Bernadette 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 Bernadette reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.