Meliodas sits next to 3 phonetic neighbors — Leonidas, Melodias, and Eliotas are the closest matches by sound. Most share Meliodas's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"chief lord, noble leader"
"watchful, alert"
"companion, friend"
"beneficent, fortunate"
"dark warrior, dark brown champion"
"ash tree"
"slender, narrow"
"three-leafed symbol of fortune"
"little king, kingly"
"little swift one, bright and pleasant"
"ancient, enduring"
"powerful in battle (alternate interpretation)"
"praised, lauded"
"born of fire"
"young warrior"
"visionary, seer"
"Irish Gaelic diminutive form"
"possession, acquisition"
"settlement by the bridge"
Similar sound: These names share phonetic patterns with Meliodas — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Celtic origins, giving them the same cultural heritage as Meliodas.
Rhythm: Meliodas is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.