FYI - Charles Martel’s hammer was almost certainly not a 12oz one!
As for being a descendant of Charles Martel, the most famous linkage is to his even more famous grandson, Charles the Great aka Charlemange. Given a computation of a generation every 30 years, back to 800 is 40 generations or 2^40 which basically translates to if you have a single ancestry linkage to western Europe and you can get a noticeable sunburn, say hi to g-g-g-g-g-g-g-...grandpappy.
Charlemagne had 18 children. I read somewhere that half the population of western Europe is descended from him.