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"
"descendant of the red one"
"gold, golden one"
"Council friend; chief; variant of Melvin"
"a thick bush or clump of ivy"
"linden tree settlement"
"of the forest people"
"just, equitable"
"pledge, servant"
"white clay, potter's clay"
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.