Ragnhild is from the Old Norse regin (counsel, advice, the gods) + hildr (battle). 845-?) — wife of Harald Fairhair, mother of King Eric Bloodaxe; Ragnhild Sigurdsdatter (10th century) — mother of King Harald I of Norway; the name appears throughout the iconic Heimskringla (the chronicle of Norwegian kings by Snorri Sturluson, c. Ragnhild Halvorsen — modern Norwegian figure. Ragnhild Tveiten — Norwegian Olympic skier. Princess Ragnhild — multiple Norwegian royal heritage naming.
Ragnhild is a compound name. Its parts are regin + hild — each an attested element with a recorded meaning of its own.
Ragnhild 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 Ragnhild reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.