Jayce sits next to 4 phonetic neighbors — Jason, Jayden, and Jace are the closest matches by sound. Most share Jayce's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"healer"
"teacher, messenger"
"hawk of the plain"
"one who resembles God"
"to flow down, descend"
"God is gracious"
"surname origin from Gaelic Mac Caid"
"son of Grey"
"strong, powerful"
"son of the valiant one"
"gracious, merciful"
"descendant of the red-haired one"
"king's town"
"companion, friend, from Arabic Kadin"
"handsome; fair one"
"father of many nations"
"advice, counsel"
Similar sound: These names share phonetic patterns with Jayce — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Jayce.
Rhythm: Jayce is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.