Jimmy sits next to 3 phonetic neighbors — Jamie, Jimmie, and Jenny are the closest matches by sound. Most share Jimmy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Supplanter"
"American vernacular diminutive name"
"strong, healthy, vigorous"
"more desirable, better"
"from the land of the Franks, France"
"wagon maker, wagoneer, carter"
"truth"
"queen, princess"
"woman from Lorraine (Lotharingia)"
"Honey bee; sweet and industrious one"
"bold wanderer, little one"
"One who tends or holds; occupational name related to tenner"
"famous, renowned"
Similar sound: These names share phonetic patterns with Jimmy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via English origins, giving them the same cultural heritage as Jimmy.
Rhythm: Jimmy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.