Simcha sits next to 3 phonetic neighbors — Simka, Simcha, and Semcha are the closest matches by sound. Most share Simcha's Hebrew-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"joy, happiness"
"peace"
"God will live, may God live"
"consecrated, set apart"
"Dutch diminutive form of Adriaan"
"one who catches fish"
"twisted, entwined"
"Moorish, dark-complexioned"
"peace, peaceful"
"high mountain, exalted"
"my help is God"
"loves horses (Philip variant)"
"mystery of the divine"
"pledged, devoted"
"my strength is Yahweh"
"so be it, truth, certainty"
"God is gracious (related to Yohanan)"
"righteous, just"
"God is salvation, Yahweh saves"
"help, helper"
Similar sound: These names share phonetic patterns with Simcha — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Simcha.
Rhythm: Simcha is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.