Cash sits next to 4 phonetic neighbors — Cash, Cass, and Dash are the closest matches by sound. Most share Cash's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Currency"
"God's gift"
"white hawk of battle"
"God is gracious"
"soldier"
"spotted stone"
"Beauty, grace"
"conqueror, winner"
"modern American invention"
"son of God's grace"
"winding valley"
"whole, universal power"
"homestead by a stream"
"rock, stone"
"the great river"
"coal, swarthy"
"raven"
"growth, abundance (speculative)"
"master of inspired frenzy"
"strong, virtuous"
Similar sound: These names share phonetic patterns with Cash — similar vowel sounds, consonant clusters, or rhythm.
Rhythm: Cash is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.