Giselle sits next to 4 phonetic neighbors — Gisele, Isabelle, and Michelle are the closest matches by sound. Most share Giselle's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pledge, hostage (of good faith)"
"goddess of the hunt and moon"
"bold journey"
"white or bright settlement"
"unfortunate, ill-omened"
"one who listens"
"wonderful, admirable"
"grace, divine favor"
"murmuring rock, ambush rock"
"pure, unsullied"
"little rose"
"elf ruler"
"fragrant gift"
"battle glory"
"precious gem"
"resolute protector"
"torch, bright one"
"noble, of noble birth"
"of noble birth"
"noble army woman"
Similar sound: These names share phonetic patterns with Giselle — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic (gisal) origins, giving them the same cultural heritage as Giselle.
Rhythm: Giselle is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.