Nissi sits next to 4 phonetic neighbors — Missy, Sissy, and Lissy are the closest matches by sound. Most share Nissi's Hebrew-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"my miracle"
"who is like God? (rhetorical, implying no one)"
"slender, narrow"
"weary, delicate"
"hear me, listen"
"oak tree, terebinth"
"honey"
"God with us, divine presence"
"my father is noble"
"strength of God"
"harmonious, musical, well-ordered"
"divine assistance"
"personal magnetism, compelling charm"
"door, gateway"
"to ascend, climb"
"God is my judge"
"firebrand, burning flame"
"thankful, one whom God hears"
"asked of God"
Similar sound: These names share phonetic patterns with Nissi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew (nes = miracle) origins, giving them the same cultural heritage as Nissi.
Rhythm: Nissi is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.