Amer sits next to 4 phonetic neighbors — Amir, Omar, and Ameer are the closest matches by sound. Most share Amer's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"flourishing, prosperous"
"full of life, vivacious"
"one who spreads happiness"
"peace, safety, security"
"sound in judgment"
"one who returns to safety"
"plant of paradise"
"royal falcon, noble bird"
"dawn, understanding"
"greater in glory"
"father of many nations"
"bright, shining, radiant"
"from Hadria (a Roman city)"
"handsome, good"
"one with great strength and bravery"
"elevated, noble one"
"cherished, dear one"
"most brilliant, most radiant"
"storyteller, keeper of oral tradition"
Similar sound: These names share phonetic patterns with Amer — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic root a-m-r origins, giving them the same cultural heritage as Amer.
Rhythm: Amer is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.