Kjersti is a Norwegian feminine given name derived from the Old Norse 'Gyrdr'. It's composed of elements meaning 'spear' and 'ruler', thus translating to 'spear ruler'. The name was popularized by the heroine Kjartan's sister, Kjǫtvi in the Icelandic saga 'Laxdœla saga'. Today, Kjersti remains a common choice among Norwegian parents, carrying a strong and regal aura.
"The name Kjersti experienced varying popularity over the years, peaking in 1976 with 13 births and again in 1992 with 18 births. However, it appears to have declined since then, with only 5 or 6 births per year from 1996 onwards."