Brielle is a short form of Gabrielle — itself the feminine of Gabriel, from the Hebrew Gavriʾel (גַּבְרִיאֵל), meaning "God is my strength." In French, the standalone form Brielle is also a coastal town in the Netherlands.
Brielle entered the U.S. top 1000 in 2002 and has climbed steadily into the top 110.
Brielle 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 Brielle reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.