Xana- The -ana ending may seem boring and overused to some, but beginning with the electric letter X makes Xana exciting and unique.
Xandria- She's a shortening of Alexandria that is usable in her own right. She's perfect for people who love the ending of Alexandria, just not the five syllables.
Xanthe- Xanthe is one of my favorite names. I've loved her for a long time, but she doesn't mesh well with my other top choices. She comes from the Greek word meaning "yellow," and is pronounced (ZAN-thee).
Xanthippe- Most of you probably heard Xanthippe for the first time on Netflix's The Unbreakable Kimmy Schmidt. She goes by Xan on the show, a nickname that makes Xanthippe much more accessible. Would any of you use her?
Xaverie- At first glance, Xaverie looks like a made-up mix of Xavier and Avery, but that's not the case. She's a French and Czech form of Xavier, and a variation of Xaviera. She'd make a great import to America--I could see Xaverie catching on.
Xenobia- Xenobia is another beautiful Greek X name. She's an alternate spelling of the more familiar Zenobia--the middle name of one of Tina Fey's daughters. I can't decide which spelling I prefer, what about you all?
Xia- Add Xia to the list of three letter -ia names for girls. With the popularity of Mia and Lia (and Fia and Pia catching on), Xia is one of the more usable names on this list.
Xiamara- Need a good full name for Xia? Xiamara is a wonderful option. She means "joyful deer" (how cute!), and could always go by the less exotic Mara.
Ximenia- Ximena is the most popular X name for girls at #162 in the top 1000. The one-letter-different Ximenia doesn't even place. She's a nature name in Spanish--the Ximenia plant produces limes.
Xois- Historically, Xois is the capital of an Egyptian dynasty, but to American ears she just sounds like Lois with an X. She's definitely an unusual appellation, but I like that she comes with the nickname Xoie.