Kaj is a ♀ girl name and a ♂ boy name. That makes Kaj one of the gender-neutral unisex names.
The origin of the name Kaj, as a form of Kai, is not clear. It is presumably a Frisian short form of Gerard or Nikolaus, but also of the Latin name Cajetanus and is of Celtic origin. It is a name for boys and seldom for girls (from Latin Cajetana or Katharina).
Kaj means “warrior” (from Frisian “kempe”), “victory of the people” (from Nikolaus), “brave spearman” (from Gerard), “from the town Gaeta” (from Cajetanus), in Celtic “spear bearer/thrower”. For girls, Kaj means “from the town Gaeta” (from Cajetana) or “pure” (from Katharina).
Based on the frequency of positive ratings, we can analyze how popular names are in different countries. The name Kaj is currently ranked #2352 on the name leaderboard.
Curious about more trends? Find out which names are most popular in the USA, Canada, Australia, and worldwide.
2025 | 2024 | 2023 | 2022 | 2021 | |
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🇳🇱 Netherlands | - | - | - | ✓ | ✓ |
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