Sommer is my first name. Not a penname. I've really been Sommer my whole life :-)
Leigh, however, is not my real last name. It is my middle name.
When I decided I was going down the publishing route and I wanted to switch over my online presence to dedicate to my writing life and journey towards publication and a writing career, I dumped all my old screen names and decided to write strictly under my name. Except my husband and I decided I would not be writing under my married name. I've mentioned before, but my husband is a high school English teacher and my target audience is YA. He wanted some anonymity when they day comes I finally do publish. Also because my married last name is kind of ugly. I mean, it is German, clunky to pronounce, and difficult to spell. I decided to drop the married name and just go with Leigh.
So, long story short, Sommer Leigh is my name. And honestly, I like Sommer Leigh so much I'm tempted to make it my legal name.
I do use another screen name sometimes, just not here. It is my email address and title of my blog: TellGreatStories.