Kaitlyn
/ˈkeɪt.lɪn/
Kaitlyn is an American spelling variant of Caitlin, which is the Irish form of Katherine. Katherine derives from the Greek Aikaterine, whose most accepted etymology connects it to the Greek katharos, meaning “pure.”
Caitlin is the traditional Irish form, pronounced KOTCH-leen or KATCH-lin in Irish Gaelic.
American parents adopted the spelling Kaitlyn in the 1980s and 1990s to phonetically represent the pronunciation familiar to English speakers while adding the fashionable -lyn ending.
What the name Kaitlyn means
Kaitlyn peaked at No. 30 in 2000 with 8,759 births. In 2024 it ranks No. 652 with 450 births, substantially below its late-1990s peak.
The Kaitlyn spelling was part of a broad wave of -lyn endings applied to traditional names in the 1990s—Katelyn, Madelyn, Jacquelyn—that produced a cohort of similarly structured feminine names across that decade.
Three syllables—KAYT-lin—are crisp and familiar. The name sounds identical to Katelyn and nearly identical to Caitlin, making spelling the primary differentiator between the variants.
Parents who chose Kaitlyn in the 1990s and 2000s were following the peak of the trend. Today the name reads as a marker of that specific era, firmly a generation name.
Related spellings include Caitlin (Irish original), Katelyn, Katelynn, Kaitlin, Katlyn, and the shortened forms Kate, Katie, and Kay—all variants on the pure Katherine root.
US popularity over time
Numerology and symbolism
Based on Pythagorean numerology — a traditional system linking name letters to numbers. Presented for cultural interest.
Famous people named Kaitlyn
Kaitlyn - similar names
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