Don sits next to 4 phonetic neighbors — Dawn, Donna, and Don are the closest matches by sound. Most share Don's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"ruler of the world"
"from the land of the Franks, France"
"queen, princess"
"strong, healthy, vigorous"
"wagon maker, wagoneer, carter"
"Wonder, miracle, something marvelous"
"Yahweh saves"
"bright, shining one (via Eleanor/Lenora)"
"all wise, completely wise"
"possibly from Clara, meaning bright and clear"
"of the Vandals"
"moon (alternative etymology)"
"silky, like floss"
Similar sound: These names share phonetic patterns with Don — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Celtic origins, giving them the same cultural heritage as Don.
Rhythm: Don is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.