Kaio
Gender: Boy
Meaning: Sea; keeper of the keys; earth; forgiveness
Origin: Multiple origins — Hawaiian (sea), Welsh (keeper of the keys), Japanese (shell, ocean), Scandinavian (earth)
Popularity: Ranked #4619 in 2025 with 22 babies born.
History: A variant or related form of Kai. Shares the meaning 'Sea; keeper of the keys; earth; forgiveness.'
Similar names: kaido, kaikoa, kailo, kailoh, kainoa, kainoah, kaiomi, kaion
Name length: 4 letters
How common is Kaio? About 1 in 151,296 babies born in 2025 were named Kaio, or roughly 0.1 per day in the United States.
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Frequently asked about Kaio
What does the name Kaio mean?
Kaio means “Sea; keeper of the keys; earth; forgiveness” from Multiple origins — Hawaiian (sea), Welsh (keeper of the keys), Japanese (shell, ocean), Scandinavian (earth) roots.
What is the origin of the name Kaio?
Kaio has Multiple origins — Hawaiian (sea), Welsh (keeper of the keys), Japanese (shell, ocean), Scandinavian (earth) origin. The traditional meaning is “Sea; keeper of the keys; earth; forgiveness”.
How popular is Kaio?
Kaio ranked #4539 in 2025 — given to 22 babies that year.
When was Kaio most popular?
Kaio peaked in 2023 with 26 babies registered that year.
Is Kaio a boy or girl name?
Kaio is predominantly a boys' name — over 90% of Kaios in registered births are male.
Is the name Kaio rising or falling in popularity?
Kaio has risen 614 spots in the rankings over the last 5 years — from #5153 in 2020 to #4539 in 2025.
How long has Kaio been recorded?
Kaio appears in birth records across 28 years — from 1993 through 2025.