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"
"bold counsel"
"hard, earnest + friend"
"Herd farm or livestock enclosure"
"healing, wholesome"
"one who lives or works in the forest"
"wolf"
"meadow by the bow or bend"
"from the hill by the loud river"
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.