Maddix is a variant of Maddox, a Welsh surname that means "son of Madoc", a medieval name often glossed as "fortunate" or "generous". Maddox became a first name after Angelina Jolie chose it for her son in 2002, and the -ix spelling followed. In the United States Maddix peaked at number 1315 in 2015 and ranks at number 2866 in 2025.