Son of Madoc; fortunate
Maddex is a modern American spelling variation of the Welsh name Maddox. It is derived from the Welsh personal name Madoc, which is rooted in the word 'mad' meaning 'fortunate' or 'good'.
About 34 boys were named Maddex in 2025.
US births per 5-year period, 1990–present (SSA data).
