Koden sits next to 5 phonetic neighbors — Cody, Caden, and Koda are the closest matches by sound. Most share Koden's American English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"modern American name blending Cody and -den suffix"
"the sun, solar light"
"vitality, living energy"
"enduring, steadfast"
"open grassy plain"
"claw of a bird of prey"
"small amphibian (secondary association)"
"from Britain, Briton"
"a fast-moving projectile, symbol of speed and ambition"
"son of the home ruler"
"uncertain — possibly related to the island of Ikaria"
"son of Rawlin"
"to increase, to grow"
"from the Bexton place"
"brewer, one who brews"
"he has given, gift of God"
"protector of people"
"graced by God"
"oak grove"
"dark, black"
"day"
Similar sound: These names share phonetic patterns with Koden — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have American English origins, giving them the same cultural heritage as Koden.
Rhythm: Koden is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.