Marth sits next to 4 phonetic neighbors — Martha, Mars, and March are the closest matches by sound. Most share Marth's biblical cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"mistress, lady of the house"
"peace and reconciliation"
"Carl's town, farmer's settlement"
"bold in counsel"
"linden tree valley"
"Noble; of noble kind. A variant of Adele and Adell, rooted in the O..."
Similar sound: These names share phonetic patterns with Marth — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Aramaic origins, giving them the same cultural heritage as Marth.
Rhythm: Marth is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.