Caius sits next to 5 phonetic neighbors — Kai, Gaius, and Cayo are the closest matches by sound. Most share Caius's Latin-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"to rejoice, joyful"
"flame, fiery one"
"God has remembered"
"fragrant, sweet-smelling"
"from Dayton"
"son of the army ruler"
"the younger one"
"son of Judd"
"lion, brave one"
"at the cattle sheds, one from the byres"
"supplanter, one who follows at the heel"
"of the raven, raven-like"
"voice of God"
"fisherman"
"lowlands"
"dark settlement"
"western town"
"craftsman of fermented beverages"
"joy, laughter"
"God shall add (another son)"
"spotted one"
Similar sound: These names share phonetic patterns with Caius — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Caius.
Rhythm: Caius is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.