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"
"gift, good-natured"
"chief, leader"
"radiant, luminous"
"from the Frankish haigro (heron)"
"faithful as a dog, devoted"
"rhythmically invented name"
"an act of spiritual thanksgiving"
"from Dreux (ancient French city name)"
"gift from God, he who is sent"
"modern coinage; possibly day-bright valley dweller"
"noble, distinguished"
"land beside the road"
"vivid, alive"
"greatest's son"
"from Athens"
"God is gracious"
"king's portion"
"modern invented name, phonetic creation"
"spirit of battle"
"divine wonder"
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.