Anna Duggar just delivered her third child with husband Josh. The couple has named their newest child Marcus. Marcus has an older brother name Michael and an older sister named Mackynzie. This seems to be continuing the Duggar traditional of having their children’s names all begin with the same letter. Josh Duggar is the the eldest child of Jim Bob and Michelle Duggar. Michelle and Jim Bob named gave all their children names that start with the letter “J.” This is no rare occurrence. Families around the world have had done this, but when it comes to large families the trend becomes even more noticeable.