Jean sits next to 4 phonetic neighbors — John, Gene, and Gian are the closest matches by sound. Most share Jean's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"brave bear, strong as a bear"
"earnestness, sincerity"
"spotted one"
"from Percy (Norman place name)"
"powerful ruler"
"fine, elegant"
"immortal, eternal"
"cart maker, transporter"
"rock, stone"
"bent river or stream"
"genuine, bold"
"one who lives near the fens or marshes"
"of the earth, earthly"
"from the isle"
"wealthy gift"
"divine protection"
"Harry's son, son of the ruler"
Similar sound: These names share phonetic patterns with Jean — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via French origins, giving them the same cultural heritage as Jean.
Rhythm: Jean is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.