"Because our first daughter's name is Lincoln, which is very masculine, a friend of mine teasingly texted me and said, 'Oh great. What's this one gonna be? Navy Seal? Delta Force? Green Beret?' And I read this out loud to Kristen, and said, 'Delta! Delta Bell Shepard!' And that was it..." Dax Shepard explains how his second daughter with actress Kristen Bell got her name.