Meaning & Origin
Kathlyn is a girl's baby name, an alternate spelling of Kathleen or Catelyn, of Irish and Greek origin — ultimately from the Greek Aikaterine, which may derive from the goddess Hecate or from katharos, meaning 'pure.' With over 5,000 recorded births in U.S. SSA data, it has meaningful American roots.
The Kathlyn spelling falls between the traditional Kathleen and the more modern Kaitlyn, offering a slightly unusual bridge between the two. Its classic "Kath-" opening grounds it in well-established naming tradition, while the "-lyn" ending keeps it current and accessible.