Jackie sits next to 3 phonetic neighbors — Jacklyn, Jacqui, and Jackie are the closest matches by sound. Most share Jackie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"supplanter"
"from the River Slane"
"of the mind, intellect"
"bright, clear, famous"
"clear ice, rock crystal, quartz"
"wished-for child (from Evelyn)"
"image, likeness"
"ancestor's descendant"
"of the air"
"barberry shrub"
"from the forest, woodland"
"archer"
"beneficent, good"
"Graceful and beautiful"
"Royal meadow clearing"
"goddess"
"modern invented combination name"
"my love (term of endearment)"
"divine grace, favor"
"pearl"
"join, connect"
Similar sound: These names share phonetic patterns with Jackie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Jackie.
Rhythm: Jackie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.