Leonard sits next to 3 phonetic neighbors — Leonardo, Lennard, and Leonhard are the closest matches by sound. Most share Leonard's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"brave lion, lion-strong"
"noble bright (adal + beraht)"
"son of Jack"
"good, blessing"
"Yahweh is merciful"
"Yahweh remembers"
"savior, one who saves"
"fair warrior, white hero"
"alert, watchful"
"one who brings news"
"always king"
"right-handed, skillful"
"divine power (from Oswald)"
"noble, freeborn youth"
"requested of God"
"messenger, herald"
"heart, mind settlement"
"to heal (from iasthai)"
"strong, virtuous, honorable"
"God will uplift (from Jeremy/Jeremiah)"
"glory of the land"
Similar sound: These names share phonetic patterns with Leonard — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Leonard.
Rhythm: Leonard is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.