Cailen

Meaning & origin

Cailen is a modern, unisex name that first appeared in U.S. birth records in 1987. Its origins are uncertain, but it may be a creative respelling of Cailin, a variant of Kaylyn, or an anglicization of the Irish Cáelín. The name saw a modest peak in 2007, when it ranked highest, but has since declined in use. As of 2025, it ranks 9,714th and is given to roughly 1 in 244,011 babies. The name is used for both boys and girls, though more commonly for girls, and is found across the United States without a strong concentration in any particular state. Its falling trajectory since 2010 suggests it is a name that saw a brief, small surge in the late 2000s and has since become less frequent.

Cailen first appears in U.S. records in 1987, suggesting a modern coinage. The name may be a creative respelling of Cailin or Kalen, which are themselves variations of Kaylyn or Caitlin. Alternatively, it could be influenced by the Irish name Cáelín, a diminutive of Cáel meaning 'slender'. However, no single etymology is firmly established, and the name is best described as a modern, invented name with multiple possible influences.