Leroy sits next to 3 phonetic neighbors — Roy, Elroy, and Delroy are the closest matches by sound. Most share Leroy's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"the king"
"son of the red-haired one"
"courageous heart"
"panache, flair (as in 'cut a dash')"
"mind, intellect, spirit"
"glory of the land"
"watchful, vigilant (via Casey)"
"leek farm village"
"alert, watchful"
"bringer of treasure (gift-bearer)"
"may God protect, holder of the heel"
"light, luminous"
"dealer in provisions and supplies"
"plum tree (unrelated homophone)"
"wild rose bush"
"Hugh's settlement, town"
"right-handed, skillful"
"strength, permanence"
"one who lives near the fens or marshes"
"place of hawks, kite's settlement"
Similar sound: These names share phonetic patterns with Leroy — 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 Leroy.
Rhythm: Leroy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.