"If you are posting a question about the origin of a name please include as much information as possible. Most important are the gender and ethnic background."
You gave us the gender, Tammie. Now, how 'bout the rest? Like, what's your ethnic origin? Is Sadalina named after a family member? Where did that family member come from? Where did YOU find the name "Sadalina"? Did you find this name somewhere, or did you hear it in your dreams? You know, stuff like that is what you've been asked to provide.
-- Nanaea