Frederic sits next to 4 phonetic neighbors — Frederick, Friedrich, and Fredrick are the closest matches by sound. Most share Frederic's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"peaceful ruler, peaceful power"
"chamber, enclosed space"
"gift of God"
"from Stockton"
"supplanter"
"prosperity, abundance"
"descendant of the spirited one"
"son of Rhys, son of the ardent one"
"one who works with stone"
"great one"
"God is gracious"
"bramble, thicket"
"of the crow, raven-haired"
"healer, physician"
"rule, standard"
"old friend"
"gray-haired one from the valley"
"settlement near rye fields"
"place of the male deer"
Similar sound: These names share phonetic patterns with Frederic — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Germanic origins, giving them the same cultural heritage as Frederic.
Rhythm: Frederic is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.