Roscoe sits next to 5 phonetic neighbors — Rocco, Ross, and Romeo are the closest matches by sound. Most share Roscoe's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"roe deer forest, deer wood"
"short form of Lavon or Yvon"
"Romantically associated with the poet Lord Byron meaning noble and ..."
"variant of Garrett/Gerald"
"modern invented name with no fixed meaning"
"liberator of men; freer of man"
"strong and kingly"
"king of the gods (Roman pantheon)"
"old friend"
"initial-name, typically Andrew James or Anthony John"
"modern invented combination"
"highlands, uplands"
"invented blend of Bray and Lynn"
"variant of Drew, meaning manly/strong"
"firebrand, burning torch"
"lapis lazuli, beauty"
"meadow town"
"lord, master"
"godly ruler"
"without death, eternal"
Similar sound: These names share phonetic patterns with Roscoe — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse origins, giving them the same cultural heritage as Roscoe.
Rhythm: Roscoe is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.