Kaj

Kaj is a feminine adaptation of a traditionally masculine Scandinavian name with roots in both Norse and Greek traditions. In its original form, Kaj (also spelled Kai) comes from either Old Norse elements meaning "keeper of the keys" or from the Greek Caius/Gaius meaning "rejoice." As a feminine name, Kaj is exceedingly rare, offering a brief, striking sound with multicultural resonance. The name's simplicity belies its rich heritage across Danish, Norwegian, Swedish, and Finnish cultures. Its compact form gives it a modern, minimalist appeal while the unusual letter combination creates a distinctive visual impression. Kaj's cross-cultural versatility and gender-bending quality make it appealing to contemporary parents seeking names that transcend traditional gender associations while maintaining historical roots.

Pronounced KY.

As of October 2026, Kaj ranked #12947 in US births in 2025 SSA, peaked at #3447 in 1969.