Hadi sits next to 4 phonetic neighbors — Mahdi, Haddi, and Hady are the closest matches by sound. Most share Hadi's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"the one who is rightly guided"
"hunter"
"helper, supporter"
"God will increase, God will add"
"iron"
"safe, secure"
"crown"
"O human being (one interpretation)"
"God will hear"
"wise, insightful"
"prophet-king of wisdom"
"the Arabic form of Jesus"
"castle, fortress, palace"
"maturity, wisdom"
"dear, beloved"
"good, handsome, beautiful"
"dark-haired"
"king, sovereign"
"little fire"
"crown, diadem"
Similar sound: These names share phonetic patterns with Hadi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Hadi.
Rhythm: Hadi is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.