Foyster sits next to 3 phonetic neighbors — Foster, Forster, and Oyster are the closest matches by sound. Most share Foyster's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"surname of English origin, possibly place or occupational"
"wolf"
"hard, earnest + friend"
"one who lives or works in the forest"
"Farm or dwelling for a herd of animals"
"brave advisor"
"meadow by the bow or bend"
"healing, wholesome"
"hill of the people"
Similar sound: These names share phonetic patterns with Foyster — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Foyster.
Rhythm: Foyster is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.