Katy sits next to 3 phonetic neighbors — Katie, Kate, and Catie are the closest matches by sound. Most share Katy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"each of the two"
"lover of horses"
"healer, physician"
"pure, unblemished"
"joyful, filled with happiness"
"beautiful, pretty"
"exalted, high, heavenly"
"God is gracious"
"coconut"
"Life, living"
"Courageous, valiant"
"noble strength"
"I'm on my way, she's on the move"
"upper class landowners (social class)"
"free woman, strong woman"
"grace, God has favored me"
"to follow at the heel"
"home of the gods"
"one who plays music"
"harmonious"
Similar sound: These names share phonetic patterns with Katy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Katy.
Rhythm: Katy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.