Mar sits next to 3 phonetic neighbors — Marie, Mara, and Mare are the closest matches by sound. Most share Mar's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sea"
"priceless, inestimable"
"holly garden (via Leslie)"
"lily flower, purity"
"new house, new home"
"God is gracious"
"sea of salvation"
"peace, safe and sound"
"creative inversion of a sacred name"
"noble, gracious"
"sorrows, pains"
"bean grower"
"purity, beauty"
"graceful, favored one"
"heavenly, elevated"
"strong, healthy, vigorous"
"bearer of good news"
"victory, triumph"
Similar sound: These names share phonetic patterns with Mar — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Mar.
Rhythm: Mar is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.