Freddie sits next to 3 phonetic neighbors — Teddy, Eddie, and Buddy are the closest matches by sound. Most share Freddie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"peaceful ruler"
"venerable, revered"
"lion"
"creative expansion of Mazie (pearl) + -on suffix"
"rocky cliff, crag"
"club, mace (Germanic surname root)"
"one who guards treasure"
"raven, crow"
"of the Julian family (Jupiter-descended)"
"hard grey quartz, fire-making stone"
"otherwise known as, alternate name"
"modern invented name, unique spirit"
"new house, new home"
"variant of Caleb, meaning faithful"
"creative modern variant of Ashton/Cashton"
"settlement by a bird-trap"
"creative spelling of Rustin"
"bald, little bald one"
"of the forest, wooded"
"clay, mortal man"
Similar sound: These names share phonetic patterns with Freddie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Freddie.
Rhythm: Freddie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.