Fredrick sits next to 4 phonetic neighbors — Frederick, Fredrik, and Fritz are the closest matches by sound. Most share Fredrick's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"peaceful ruler"
"rye land; land where rye grows"
"from Galloway"
"fire"
"of the Vergilii clan, flourishing"
"modest, shy"
"of noble origin"
"black, dark-haired"
"ruler of the home"
"holy, sacred one of God"
"wish, desire, ideal (Persian variant Arman)"
"from the raven (place name)"
"elf ruler"
"lake dweller, from the lake"
"growth, abundance, increase"
"deer people (from Devon)"
"court musician, entertainer"
"bright, splendid"
"place of lime trees"
"one who works with slate"
"sky, heavens"
Similar sound: These names share phonetic patterns with Fredrick — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old High German origins, giving them the same cultural heritage as Fredrick.
Rhythm: Fredrick is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.