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"
"valiant, brave"
"native Hawaiian hardwood tree"
"mythical bird of rebirth"
"son, born of"
"strife, quarrel"
"opportunity, happenstance"
"battle"
"chief, leader"
"rich spear, lucky warrior"
"from the green valley"
"of the forest, wood-dweller"
"powerful, brave king"
"river that swallows all rivers"
"appointed by God"
"small, humble"
"ruler of the army"
"from Reims"
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.