Ellis sits next to 4 phonetic neighbors — Alice, Alexis, and Elis are the closest matches by sound. Most share Ellis's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"my God is Yahweh"
"beautiful rose"
"star, celestial body"
"devoted to God"
"my God has answered"
"one's own meadow, Aen's clearing"
"divine gift"
"rebellion"
"queen, wife of the khal (warlord)"
"helped by God"
"gift bequeathed, lasting impact"
"from France, Frankish"
"to be of worth, to be strong"
"water meadow dweller"
"sea of bitterness"
"little Laura"
"exalted, ascending"
"shining torch"
"son of Cionaodh"
"meadow dwelling"
Similar sound: These names share phonetic patterns with Ellis — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Welsh origins, giving them the same cultural heritage as Ellis.
Rhythm: Ellis is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.