My friend Willie Robertson, the star of the A&E hit television series “Duck Dynasty,” is perhaps best known for his beard, his best-selling duck calls and his colorful family. If you’ve watched the show, you know that family is of paramount importance to the Robertson clan, which gathers its generations together regularly for a meal and some playful ribbing. But you might not know that 11 years ago, Willie and his wife, Korie, added a child to their already growing family, adopting Will...