Mahdi sits next to 4 phonetic neighbors — Mehdi, Madhi, and Madi are the closest matches by sound. Most share Mahdi's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"one guided by God"
"befitting, suitable"
"throne"
"manifest, apparent, visible"
"the Arabic form of Jesus"
"the commended one"
"dove"
"worshipper of Al-Rahman"
"belonging to the country, widely known"
"may He add"
"eternal, immortal, everlasting"
"exalted, high, noble"
"builder, one who populates"
"wish, longing, desire"
"dark-haired"
"Persia (place name)"
"mysterious Quranic letters, known only to God"
"owner, possessor"
Similar sound: These names share phonetic patterns with Mahdi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Mahdi.
Rhythm: Mahdi is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.