Leopold sits next to 3 phonetic neighbors — Leonardo, Leon, and Leopoldo are the closest matches by sound. Most share Leopold's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"brave people, bold folk"
"God is gracious"
"king, royal"
"darling, beloved"
"little dark one (from Latin niger)"
"The sky, heavens"
"majestic, venerable"
"thorny shrub, wild rose"
"little red-haired one"
"son of the spear-ruler (Gerald = Geirald)"
"descendant of Jenkin"
"dear, beloved"
"land, territory"
"dweller near the marsh"
"cowherd's descendant"
"settlement by the bridge"
"dove"
"the god of love"
"modern invented name with no fixed meaning"
"honor-friend"
"from the surname of poet W.H. Auden"
Similar sound: These names share phonetic patterns with Leopold — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Leopold.
Rhythm: Leopold is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.