Keysi sits next to 4 phonetic neighbors — Casey, Kacey, and Kasey are the closest matches by sound. Most share Keysi's Irish Gaelic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"vigilant, watchful"
"of the Aryan people"
"white, pure (lily flower blend)"
"sky blue, the blue of a clear sky"
"date palm tree"
"branch, vine tendril"
"night beauty"
"treatment, antidote"
"brown hills"
"mine, my own (Mia) with grace suffix"
"helpful, descendant of the helpful one"
"lady, noblewoman"
"dweller near the ash grove"
"peace"
"song, melody, air"
"descendant of the king"
"jasmine flower"
"noble, of noble kind"
"night rain (from Amaya root)"
"queen, wife of the khal"
"joy, music (archaic)"
Similar sound: These names share phonetic patterns with Keysi — 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 Keysi.
Rhythm: Keysi is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.