Keyden sits next to 4 phonetic neighbors — Kayden, Caiden, and Aiden are the closest matches by sound. Most share Keyden's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Cadan, fighter"
"baker"
"modern invented variant"
"God has heard"
"my inheritance"
"the smallest unit of matter"
"great river"
"descendant of the champion"
"from the Lennox region of Scotland"
"peak, summit, apex"
"first citizen, ruler"
"increase, wisteria"
"dark blue"
"short form of Matthew"
"nautical mile, measure of sea distance"
"beloved, darling"
"bright, shining one"
"God is salvation (via Joshua/Hebrew connection)"
"God is gracious"
"land of oaks"
"letter Z sound"
Similar sound: These names share phonetic patterns with Keyden — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish origins, giving them the same cultural heritage as Keyden.
Rhythm: Keyden is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.