Marshall sits next to 4 phonetic neighbors — Marshal, Marcus, and Harrison are the closest matches by sound. Most share Marshall's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"keeper of horses, horse servant"
"he has heard, God has heard"
"from the green valley"
"born of fire"
"Currency"
"rock, stone"
"one who bails, deliverer"
"drawn out of water"
"victory of the people (from Nicholas)"
"steadfast, firm"
"gentle, beloved"
"modern coined name"
"money box, treasury"
"sea-born, born of the sea"
"Finnish person, Norseman"
"powerful, brave king"
"father of many nations"
"God strengthens, Yahweh is my strength"
"steadfast, firm"
"young horse tender"
"descendant of the red-haired one"
Similar sound: These names share phonetic patterns with Marshall — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Marshall.
Rhythm: Marshall is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.