Jaycee sits next to 5 phonetic neighbors — Casey, Lacey, and Tracey are the closest matches by sound. Most share Jaycee's American-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"phonetic rendering of initials J and C"
"crossroads, cross"
"precious green stone"
"shining, brilliant"
"son of Cole; victorious people"
"honey, sweet"
"guardian of prosperity"
"settlement on the ridge, keel town"
"slender, narrow"
"God supports"
"God has promised"
"remembered by the Lord"
"lake meadow"
"little fire"
"immortal, deathless"
"rocky hill settlement"
"Son of Walter"
"son of Lars (son of Lawrence)"
"white field, white acre"
"possibly from dragon + valley"
"wolf-desire, wolf's help"
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 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.