Cayce sits next to 4 phonetic neighbors — Casey, Kasey, and Kacey are the closest matches by sound. Most share Cayce's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
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"brave in battle, vigilant"
"sight, ability to see"
"of Saturn, god of agriculture and time"
"far-sighted, young (if from Cyrus)"
"of the estate"
"one who prevails"
"one who sways, dancer"
"from, of (noble origin)"
"modern American invented name"
"fiery one"
"gift of God (via Matthew)"
"creative American construction"
"clearing in the forest"
"invented modern variant"
"little deer"
"from the fortified city"
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"chief lord, noble leader"
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"fern plant (feathery frond)"
Similar sound: These names share phonetic patterns with Cayce — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic O Cathasaigh origins, giving them the same cultural heritage as Cayce.
Rhythm: Cayce is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.