Monroe sits next to 3 phonetic neighbors — Monroe, Munroe, and Roe are the closest matches by sound. Most share Monroe's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from the mouth of the Roe river"
"one who brews beer or ale"
"Yahweh saves"
"variant of Pearson: son of Piers"
"Macks settlement"
"new house, bright"
"short form of Devon/Devlin"
"dragon, serpent"
"crew, team"
"land power, territorial lord"
"deep gorge, ravine"
"powerful in battle"
"joy, laughter"
"son of Henry"
"he gave, gift"
"young male horse"
"farmer, earth-worker"
"stellar explosion, burst of light"
"illuminance unit"
"from the Rodney estate"
"Caesar, imperial leader"
Similar sound: These names share phonetic patterns with Monroe — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic origins, giving them the same cultural heritage as Monroe.
Rhythm: Monroe is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.