Kaitlyn sits next to 4 phonetic neighbors — Caitlin, Katelyn, and Kaitlin are the closest matches by sound. Most share Kaitlyn's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
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"pure"
"strength, power, virtue"
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"sea, ocean"
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"hay clearing, hay field"
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Similar sound: These names share phonetic patterns with Kaitlyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek (via Irish) origins, giving them the same cultural heritage as Kaitlyn.
Rhythm: Kaitlyn is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.