Mars sits next to 4 phonetic neighbors — Marz, Marsa, and Marcy 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
"Roman god of war"
"heavenly, child of the sky"
"angel, divine messenger"
"daughter of the sun (folkloric)"
"citizen of Rome"
"absorbed in God"
"son of Coinneach (child of Coinneach)"
"night creature, storm demon"
"wise protector"
"from Nigeria, Nigerian identity"
"short form of Kimberly; from Kimberley, South Africa"
"of Mecca, blessed place"
"creative combination name"
"small songbird"
"creative modern name with Z prefix"
"heavenly child, child of the sky"
"free-spirited, creative modern name"
"ruling family, succession of power"
"modern invented name"
"gift of God"
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 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.