Jackeline sits next to 3 phonetic neighbors — Jacqueline, Jacklyn, and Jaqueline are the closest matches by sound. Most share Jackeline's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"supplanter, one who follows at the heel"
"boundary, limit"
"from the hills, hill settlement (Bray) combined with -lin (diminutive)"
"falling, flowing motion"
"beloved of God, of the sea"
"flat-topped hill"
"beautiful maiden"
"short form of Alexandra/Alexis"
"helper"
"cinnamon, cassia tree"
"slender, lean"
"sword, firebrand (Germanic etymology)"
"modern invented name"
"royal, noble sky"
"from the salmon's lake (by etymology)"
"petite, feminine form of Charles"
"festive celebration (archaic)"
"each of the two"
"courageous, valiant"
Similar sound: These names share phonetic patterns with Jackeline — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew Yaakov (Jacob) origins, giving them the same cultural heritage as Jackeline.
Rhythm: Jackeline is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.