Rachel is a much better spelling (maybe I'm biased though). Also, I'm going to spell it that way for the combos, because thats how I'm used to it.
Rachel Agnes
Rachel Alexandra
Rachel Amabel
Rachel Amity
Rachel Anastasia
Rachel Aveline
Rachel Bettina
Rachel Bianca
Rachel Blair
Rachel Blue
Rachel Bliss
Rachel Blanhe
Rachel Cara
Rachel Carys
Rachel Celeste
Rachel Celine
Rachel Clementine
Rachel Ciel
Rachel Devorah
Rachel Dee
Rachel Delphine
Rachel Delilah
Rachel Damaris
Rachel Devika
Rachel Dionne
Rachel Eden
Rachel Edith
Rachel Elinor (Rachael Eleanor?)
Rachel Emma
Rachel Esmée
Rachel Esther
Rachel Evening
Rachel Fern
Rachel Frances
Rachel Gracemary
Rachel Hermione
Rachel Hero
Rachel Hesper
Rachel Harriet
Rachel Helene
Rachel Isobel
Rachel Imogen
Rachel Irene
Rachel Irina
Rachel Jade
Rachel Jemima
Rachel Joelle
Rachel Justine
Rachel Kavita
Rachel Keren
Rachel Keturah
Rachel Leone
Rachel Lilac
Rachel Linnea
Rachel Lucia
Rachel Lyric
Rachel Mae
Rachel Maeve
Rachel Maria
Rachel Melody
Rachel Meredith
Rachel Maud
Rachel Noelle
Rachel Nyx
Rachel Nox
Rachel Niamh / Neeve
Rachel Noor
Rachel Olivia
Rachel Odessa
Rachel Odette
Rachel Orabella
Rachel Ophelia
Rachel Oria
Rachel Piper
Rachel Pearl
Rachel Penelope
Rachel Patricia
Rachel Quinn
Rachel Rose
Rachel Rosemarie
Rachel Raphaela
Rachel Remember
Rachel Shaina (me :P)
Rachel Samantha
Rachel Sariah
Rachel Seraphine
Rachel Snow
Rachel Sophia
Rachel Star
Rachel Susannah
Rachel Temperance
Rachel Truth
Rachel Thi (tee)
Rachel Tu
Rachel True
Rachel Tate
Rachel Tacey
Rachel Unity
Rachel Victoria
Rachel Vivienne
Rachel Vanessa
Rachel Vesper
Rachel Verity
Rachel Willow
Rachel Winter
Rachel Wednesday
Rachel West
Rachel Xanthe
Rachel Zakiah / Zakiyya
Rachel Zareen
Rachel Zenovia / Zenobia
Rachel Zahara
anything you like? do tell me.