Jenniver sits next to 4 phonetic neighbors — Jennifer, Guinevere, and Juniper are the closest matches by sound. Most share Jenniver's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"white wave, fair and smooth"
"song of strength"
"from Venice, from the Veneti people"
"house of figs"
"God is gracious (via Shannon/Shane)"
"from Ancy, dancing one"
"bilberry place"
"noise, thunder"
"innocent, spotless"
Similar sound: These names share phonetic patterns with Jenniver — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh/Cornish origins, giving them the same cultural heritage as Jenniver.
Rhythm: Jenniver is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.