Mathias has also sung in bands and sometimes gives concerts. He also
has an "alter ego" as a singer, Staf Steegmans.
Mathias is the 5th of 7 children; 6 boys and 1 girl and 2 of the boys
are twins. Several people in his family are artistically gifted.
Mathias' last name is Polish. Around 1600, a Polish gentleman named
Sercu came to the region of Roeselare (Belgium). The name is not very
common outside that area.