Adan sits next to 4 phonetic neighbors — Eden, Aidan, and Adena are the closest matches by sound. Most share Adan's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"earth, ground"
"supplanter"
"variant of Siobhan (God is gracious)"
"talented; refined"
"Likely a creative variant of Danielle, meaning God is my judge"
"land of the Bretons, from Brittany France"
"variant of Chloris, flower goddess"
"eternal, everlasting"
"defender of mankind"
"blend of Marley (pleasant meadow) and Lena (light, torch)"
"noble, exalted"
"of the sea"
Similar sound: These names share phonetic patterns with Adan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Adan.
Rhythm: Adan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.