Cavan sits next to 3 phonetic neighbors — Gavin, Calvin, and Kevin are the closest matches by sound. Most share Cavan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little gentle one (variant of Kevin)"
"morally right, virtuous, just"
"holly tree"
"heather, heath plant"
"ruler of the home"
"son of the sea, born from ocean waves"
"warrior"
"herald, messenger"
"God supports"
"handsome, well-born"
"manly, brave, strong (via Andre/Andreas)"
"from Dreux (ancient French city name)"
"from denarius, silver coin"
"son of Jack"
"possessor of goodness, kingly"
"rye meadow"
"man of vigor"
"faithful as a dog, devoted"
"dark red, crimson"
"estate of the fifth son"
Similar sound: These names share phonetic patterns with Cavan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Cavan.
Rhythm: Cavan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.