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"
"descendant of Rian"
"gracious, favorable"
"Irish Gaelic diminutive form"
"one who is celebrated"
"ancient, enduring"
"distant, far off"
"strong lord, fierce chief"
"dark warrior, dark brown champion"
"brave in battle, vigilant"
"little deer"
"settlement by the bridge"
"youth, pup"
"strength, honor"
"young warrior"
"slender, narrow"
"little swift one, bright and pleasant"
"son of good fortune"
"powerful in battle (alternate interpretation)"
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.