Jenna sits next to 4 phonetic neighbors — Jennifer, Henna, and Brenna are the closest matches by sound. Most share Jenna's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"fair, smooth, white wave"
"summer"
"pure"
"gift of God (variant of Maisie/Matthew)"
"blooming flower, radiance"
"youthful, downy-bearded"
"purpose, intention"
"honey, sweet"
"heavenly, from the sky"
"high, noble (Ali) + grace (Anna)"
"from Massy, Normandy"
"star of the sea (via Mary)"
"illumination, radiance"
"life"
"with a web over her face"
"one who mills grain"
"fair, comely"
"sun, throne"
"strong, manly, brave"
"new light in the clearing"
"free man, free person"
Similar sound: These names share phonetic patterns with Jenna — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Cornish/Celtic origins, giving them the same cultural heritage as Jenna.
Rhythm: Jenna is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.