Kaydee sits next to 4 phonetic neighbors — Katie, Kady, and Cady are the closest matches by sound. Most share Kaydee's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pure, bright (from Katherine)"
"descendant of Caiside"
"beautiful birth, beloved child"
"orchid flower"
"precious, valuable"
"noble, of noble birth"
"flower that blooms in adversity"
"God has shown favor"
"protector of men"
"little song"
"life, vitality (possible Arabic root)"
"descendant of Sirideán"
"will, determination, desire"
"vision, sight"
"gracious, favored by God"
"singer, singing one (by association)"
"unique creative name combining beauty and grace"
"God is my oath"
"woodland clearing on the hill"
Similar sound: These names share phonetic patterns with Kaydee — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Kaydee.
Rhythm: Kaydee is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.