Tatum is strong, distinctive, energetic, and recommended, especially if your last name is as congenial as O'Neal. The name is now used for both genders, with the balance running about two to one in favor of the girls.
Though this surname became a first in the nineteenth century, it didn't become a ranked American girls' name until 1994, two decades after Tatum O'Neal won her Best Supporting Oscar at the age of ten. It seems to be on a slight downward trend, having fallen out of the Top 400 in 2015 for the first time since 2002.
Rose McGowan played a Tatum in the movie Scream. As a surname, Tatum is now strongly associated with popular actor Channing; in the past it was jazz pianist Art.