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"
"yellow-haired, blonde"
"new house (place name)"
"fortunate, good luck"
"God enlightens, He shines"
"bright pledge, noble hostage"
"battle, warrior"
"one who brews beer or ale"
"awareness, understanding, learning"
"Greece, Ionia (biblical Javan)"
"spear warrior"
"resolute protector"
"reddish-brown (color)"
"Caesar (imperial title)"
"Gomeric's mountain, power mountain"
"Yahweh sees"
"diminutive of Scott"
"worshipper of Yahweh"
"small sheltered coastal bay"
"valley of the River Kent"
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.