This is a new style I just tried out today on my sister that I like to call the criss-cross pigtails.
It would be a little difficult to get the cross over as neat at the back if you did it yourself but it is still possible. I started by dividing the hair into 2 straight down the middle. The first french plait crosses underneath taking a few strands of hair as you go to keep it in place. The second plait sits over the top and crosses the other way. As you can see you can also pin the bunches on top of your head for an up-do.