Kaithlyn

Meaning & origin

Kaithlyn is a modern respelling of the classic Irish name Caitlin, which itself is a Gaelic form of Catherine. First recorded in the United States in 1985, the name saw a surge in popularity during the late 1990s and early 2000s, reaching its peak rank in 2002. Since 2003, its usage has been on a steady decline, reflecting the broader trend away from -lyn suffixed names. In 2025, it ranked 13,208th, with about 1 in every 267,878 newborn girls receiving the name. While Kaithlyn has not been concentrated in any particular state, its variations have been widely used across the country. The name offers a phonetic twist on a timeless root, appealing to parents who want a familiar yet distinctive choice.

Kaithlyn is a modern English respelling of Caitlin, the Irish form of the French name Catherine, itself derived from the Greek Aikaterine. The root meaning is generally accepted as 'pure', though the exact origin of the Greek name is uncertain. The name Caitlin became popular in Ireland and the Irish diaspora, and in the late 20th century, respellings like Kaithlyn emerged as parents sought distinctive variations.