Brynja is the Old Norse word for "armor" or "chainmail" — particularly the protective coat of mail worn by Viking warriors. Used as a feminine name in Iceland and Scandinavia.
Brynja is widely used in modern Iceland.
Brynja 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 Brynja reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.