This is the closest spelling I have found to my own name. I am of German-English descent but many generations have been in North America. I pronounce it the same as Crystal. It has been mistaken for a man's name and a surname and is rarely spelled correctly by others even when they have been given the correct spelling beforehand. For many years I went by Chris. Some members of my family call me Chrissy. I now use Christol 99% of the time. My parents gave me a good strong name that I am proud of.
Christel is a name that is beautiful yet subtle, elegantly simple but still enchanting. Children and teachers will constantly call your daughter "Crystal" and frat boys will think they are original when they reference the $300 champagne. Just assure your daughter her name is as special as she is, but she may not appreciate it until she's grown into it.