Islam sits next to 3 phonetic neighbors — Isham, Islom, and Salam are the closest matches by sound. Most share Islam's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"peace"
"those devoted to doing good"
"Arabic form of the archangel Gabriel"
"biblical name from lineage of Jerahmeel"
"the collected, gathered"
"precious, incomparable"
"tree top, utterance"
"glory of Rome"
"cedar tree"
"lamp, light"
"fragrant, perfume"
"flourishing, long-lived"
"excellence, perfection"
"guardian, protector"
"pleased, at peace"
"to guard, to keep watch"
"beauty, grace"
"intimate friend, confidant"
Similar sound: These names share phonetic patterns with Islam — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Islam.
Rhythm: Islam is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.