Kayce sits next to 4 phonetic neighbors — Casey, Kasey, and Kacey are the closest matches by sound. Most share Kayce's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"alert, watchful, vigilant"
"stoneworker (from Mason)"
"king"
"master of inspired frenzy"
"victory of the people (from Nicholas)"
"eternal ruler, ever powerful"
"descendant of Ceallachán"
"Yahweh is merciful"
"fighter"
"helpful; assistant; descendant of the helpful one"
"long narrow hill"
"meadow dwelling, water meadow"
"red-haired, ruddy complexion"
"blazing iron"
"ever ruler, eternal king"
"strong, firm, enduring"
"rye clearing"
"dog (symbol of loyalty)"
"little saint"
"deep valley; hollow valley"
Similar sound: These names share phonetic patterns with Kayce — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Kayce.
Rhythm: Kayce is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.