Marlo sits next to 4 phonetic neighbors — Marlow, Carlo, and Harlow are the closest matches by sound. Most share Marlo's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"remnants of the lake"
"God has given"
"fair, white, bright"
"from the forest, woodland dweller"
"trustworthy one"
"pledged, devoted"
"rowan tree"
"auspicious mythical creature"
"reputation, esteem"
"son of Carr, son of the marsh dweller"
"guide, leader"
"held by the heel"
"narrow land, island"
"priceless one, beyond praise"
"man from South Munster (south Munster province)"
"wise protector from the valley"
"cellar keeper, wine steward"
"bear"
"resolute protector (if variant of Liam)"
"lead metal, dense and enduring"
"descendant of the salmon"
Similar sound: These names share phonetic patterns with Marlo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Marlo.
Rhythm: Marlo is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.