Cainan sits next to 5 phonetic neighbors — Kenan, Kainan, and Cainen are the closest matches by sound. Most share Cainan's Hebrew-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"smith, metalworker"
"the smallest unit of matter"
"bright, brilliant"
"clerk, scholar, scribe"
"cause of death, ruin, poison"
"born of light"
"sickness; weakness"
"ruler of the people"
"lord, my lord"
"guardian, protector (by extension)"
"fragrant, perfume"
"from Tracy, a Norman place"
"dark, coal-black"
"he is Yah (God)"
"son of the eternal king"
"power of the people"
"excellence of Zion"
"God is my helper"
"glowing coal, burning ember"
"a stranger there"
"growth, abundance, increase"
Similar sound: These names share phonetic patterns with Cainan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Aramaic origins, giving them the same cultural heritage as Cainan.
Rhythm: Cainan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.