Oumou sits next to 3 phonetic neighbors — Uma, Amou, and Umou are the closest matches by sound. Most share Oumou's Arabic via West African Mande-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"mother, beloved mother"
"new grace, gracious new beginning"
"rulers counsel (from Ronald)"
"rock, little rock"
"fire, grain of fire (Gaelic Eithne)"
"sound judgment, discernment"
"holy, sacred (possible folk etymology connection)"
"God is with us"
"life, visible"
"God is gracious"
"phonetic blend name, modern coinage"
"elf, magical being"
"modern invented name"
"beloved, dear"
"shining light, bright one"
"clear skies, fair weather (original meteorological sense)"
"lyric poem of love and longing"
"royal, of the Kayanian dynasty"
"combination of char + issa (honey/bee)"
"the dignity and power of a king or queen"
"jasmine flower"
Similar sound: These names share phonetic patterns with Oumou — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic via West African Mande origins, giving them the same cultural heritage as Oumou.
Rhythm: Oumou is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.