Jaycee sits next to 3 phonetic neighbors — Jackie, Jaci, and Casey are the closest matches by sound. Most share Jaycee's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"variant of Jackie or Casey"
"from the town of Lassy in Normandy"
"gift, grace"
"marshy clearing"
"compassion, forgiveness, grace"
"water lady, she who comes from the water"
"glowing ember, burning coal remnant"
"exalted one, the high one"
"handsome, comely"
"elf ruler, ruler of supernatural beings"
"Malay peninsula"
"open plain"
"manifestation of God"
"from Quincy, France"
"leaping water"
"meadow near the birch trees"
"strong, manly, brave"
"well-spoken of"
"grace and drop of the sea (Maria + Anna)"
"feminine of Michael (gift of God in folk etymology)"
"lovely, fair"
Similar sound: These names share phonetic patterns with Jaycee — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have American English origins, giving them the same cultural heritage as Jaycee.
Rhythm: Jaycee is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.