Inga is an Old Norse name tied to Ing, an older name for the god Freyr, god of peace, prosperity and fair harvests. To be named for Ing was to be blessed with plenty and calm.
Simple and strong, it has been a Scandinavian staple for centuries and travels easily across northern Europe.
Inga 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 Inga reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.