Kaidan is of Irish origin and means "from the dark river." It is a unisex name, though it's more commonly used for boys. The name has a distinct, almost mystical sound to it, which could appeal to parents looking for something unique for their child. It rolls off the tongue easily, with a rhythm that makes it memorable. Kaidan is also quite versatile in terms of nicknames and can be shortened to Kai or Ian, depending on personal preference. Despite its Irish roots, Kaidan has gained popularity worldwide, especially in English-speaking countries like the United States and Canada. However, it remains relatively rare, which could make it a appealing choice for parents who want their child's name to stand out without being too eccentric.
The name Kaidan had a notable increase in popularity between 2006 and 2008 with ten births each year, followed by a decline to five or six births annually until 2014, then fluctuating between five and eight births yearly up to 2017.