Keiden sits next to 5 phonetic neighbors — Caden, Kaden, and Cayden are the closest matches by sound. Most share Keiden's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little battle, warrior spirit"
"land of the lochs, fjord-land"
"warrior"
"resolute will, helmet of will"
"modern coinage; possibly day-bright valley dweller"
"bold, narrow strait"
"fifth"
"grace, blessing"
"resolute, brilliant"
"hunter's woodland"
"from denarius, silver coin"
"alert in battle"
"spear strength"
"hollow stone, hollow hill"
"edge, border of land"
"spirited, broad"
"one who moves smoothly"
"palm tree, upright"
"ocean, sea (from Kai)"
"God is gracious"
Similar sound: These names share phonetic patterns with Keiden — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish/Welsh cadan origins, giving them the same cultural heritage as Keiden.
Rhythm: Keiden is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.