Mattheo is Voldemort's son and Tom's younger brother, mattheo fights all the time and is a player with the girls. Mattheo, Tom, Theo, Enzo, Blaise, Draco, Regulus, pansy and Max are all slytherin's and also death eaters for voldemort.

But then there is a new girl at Hogwarts, Jax Grindelwald the daughter of Gilbert Grindelwald. Jax looks like the mini girl version of Gilbert, black eye and snow white hair with black highlights. Jax even has Gilbert's personality.

*Mattheo fell for Jax,