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
"singer, chanter, cantor"
"Eternal ruler; ever powerful"
"old river, wise one"
"snow, snow-white"
"creative variant of Vanessa"
"bitter"
"Generous, noble, kind, magnanimous"
"gift of dawn, blessed morning"
"from Venice, the beautiful city on water"
"meadow slope and consecrated to God"
"who is like God"
"Worthy of praise; a creative name meaning praise"
"little charm, enchanting song"
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.