Jacen sits next to 5 phonetic neighbors — Jason, Jaden, and Jayson are the closest matches by sound. Most share Jacen's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"healer"
"charcoal merchant, coal worker"
"passion, zeal (from root name Rhys)"
"short form of Trevor meaning large homestead"
"victorious people (from Gaelic connection)"
"slender, powerful in battle"
"son of Hans (John)"
"prince, king"
"crow crossing"
"precious, supremely valuable"
"vigilant in war, son of Cathasach"
"peak, summit, apex"
"Olympic victor"
"Yahweh remembers"
"Greece, Ionia (ancient land)"
"variant of Tyson, firebrand"
"son of grace; graceful"
"lake of the sage Kashyapa (Sanskrit etymology)"
"American invented name with theophoric -jah suffix"
"short form of Tyler or Tyson"
"God is gracious"
Similar sound: These names share phonetic patterns with Jacen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Jacen.
Rhythm: Jacen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.