Beach sits next to 4 phonetic neighbors — Beech, Beau, and Birch are the closest matches by sound. Most share Beach's Old English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sandy shore, coastal land"
"pledge, servant"
"strawberry, forest men"
"linden tree settlement"
"gold, golden one"
"light-haired, pale-complexioned"
"a thick bush or clump of ivy"
"white clay, potter's clay"
"Council friend; chief; variant of Melvin"
"descendant of the red one"
Similar sound: These names share phonetic patterns with Beach — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Beach.
Rhythm: Beach is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.