Jess sits next to 3 phonetic neighbors — Jesse, Jed, and Les are the closest matches by sound. Most share Jess's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God exists, God is"
"traveling salesman"
"God is salvation"
"slender, narrow"
"lion"
"modern American creation with roots in Keon (God is gracious)"
"God is gracious (from Shawn/Sean)"
"settlement by the ash trees"
"modern coinage; visually distinctive invented name"
"twin"
"warrior's town"
"free man"
"spear rule, lord of the spear (via Gerald)"
"one who speaks for God"
"famous land"
"son of Brice, son of the speckled one"
"God is gracious"
"battle warrior, army in battle"
"bright-headed"
Similar sound: These names share phonetic patterns with Jess — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Jess.
Rhythm: Jess is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.