Keisi sits next to 4 phonetic neighbors — Casey, Kasey, and Kaci are the closest matches by sound. Most share Keisi's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"joyful poem"
"divine sky beauty"
"dwelling by the meadow valley"
"warrior, champion"
"lake, waterfall"
"each of the two (variant etymology)"
"festival of roses"
"new beginning"
"slender, narrow"
"laurel tree, bay laurel"
"compassion, kindness"
"white wave"
"fictional Na'vi name from the Avatar franchise"
"youthful, devoted to Jupiter"
"pretty, lovely"
"place name used as given name"
"pleasantness, beauty"
"honest, truthful"
"gracious gift"
"energetic, powerful"
"power, work, vigor"
Similar sound: These names share phonetic patterns with Keisi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Keisi.
Rhythm: Keisi is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.