Mars sits next to 4 phonetic neighbors — Ares, Marks, and Marcus are the closest matches by sound. Most share Mars's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"god of war"
"worker in steel (occupational surname)"
"cross, crossroads"
"name of God"
"continuous improvement (kaizen-inspired)"
"Caesar, imperial leader"
"red river settlement"
"dark settlement (place name)"
"from Kent, the English county"
"dweller in the valley"
"fair, attractive"
"of God, God's own"
"God heals"
"modern creative name construction"
"victory, triumph"
"from the Welsh Seisyll"
"rare, extraordinary"
"greatest town"
"firm, unwavering"
Similar sound: These names share phonetic patterns with Mars — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin/Roman origins, giving them the same cultural heritage as Mars.
Rhythm: Mars is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.