Kersti sits next to 4 phonetic neighbors — Kirsti, Kirsten, and Kerstin are the closest matches by sound. Most share Kersti's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Generous, noble, kind, magnanimous"
"old river, wise one"
"snow, snow-white"
"little charm, enchanting song"
"sacred ceremonial plant"
"creative variant of Vanessa"
"meadow slope and consecrated to God"
"gift of dawn, blessed morning"
"Eternal ruler; ever powerful"
"singer, chanter, cantor"
"from Venice, the beautiful city on water"
"Worthy of praise; a creative name meaning praise"
"who is like God"
Similar sound: These names share phonetic patterns with Kersti — similar vowel sounds, consonant clusters, or rhythm.
Rhythm: Kersti is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.