Jamarcus sits next to 4 phonetic neighbors — Marcus, Demarco, and Jermaine are the closest matches by sound. Most share Jamarcus's Latin Marcus-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of Mars, warlike"
"of the Marco family"
"moon, lunar brilliance"
"belonging to Mars"
"little rock"
"singer, one who praises"
"he who holds firm the good"
"creative modern invention"
"sincere, genuine"
"modern invented name"
"prince, commander"
"born on Saturday"
"modern invented name with Zy- prefix"
"owner, possessor"
"completion, eternity"
"lordly, master (via Cyril)"
Similar sound: These names share phonetic patterns with Jamarcus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin Marcus origins, giving them the same cultural heritage as Jamarcus.
Rhythm: Jamarcus is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.