“It’s official: Jacob and Sophia are America’s most popular baby names. Once you’ve settled on a name for your new bundle of joy, it’s not too early to make legal preparations as your child enters the world.

Jacob has been the No. 1 boy’s name for 13 years, according to the Social Security Administration, which released the list of top baby names for 2011. Sophia knocked Isabella to No. 2 after a two-year stint at the top of the list for girls.

If you have a young child in your home, it’s already time to start thinking about estate-planning issues to protect your newborn. Following are the five most common estate-planning mistakes that parents make after having a baby.”