Oumar sits next to 4 phonetic neighbors — Omar, Umar, and Amar are the closest matches by sound. Most share Oumar's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"flourishing, long-lived"
"lamp, light"
"son, child"
"peaceful"
"trustworthy, reliable"
"father of many nations"
"son of the right hand"
"repose, peace"
"great king, emperor"
"pure monotheist"
"spiritual, soulful"
"good judgment, righteous guidance"
"heir, inheritor"
"persevering, steadfast"
"commander, leader"
"successor, caliph"
"friend, companion"
"the righteous ones, the pious"
Similar sound: These names share phonetic patterns with Oumar — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Oumar.
Rhythm: Oumar is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.