This is more likely to have responses in the opinions board. You can also choose meanings by clicking on the cog next to the search bar at the top of the website.
Names that fit into the categories are...
Meaning Quick:
https://www.behindthename.com/names/meaning/quickMeaning Sudden:
https://www.behindthename.com/names/meaning/suddenMeaning Swift:
https://www.behindthename.com/names/meaning/swift
Surprise has no hits and the only hits for unexpected is a male name. So, you may want to think outside of the box. I think
Olympia would be really cute, paying homage to being quick and fast as those competing in the Olympics would be. Or maybe the name of the woman with the fastest recorded labor,
Mary? Or what about an homage to the fastest mammal, the cheetah, with the name
Felina or Cita (from the Hindi word for cheetah)?
~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~~*~ "I'm
Princess Angelina Contessa
Louisa Francesca Banana Fanna
Bo Besca the Third. But you can call me
Dot."