charles joseph ignace marie welter (6 april 1880 – 28 march 1972) was a dutch politician and diplomat of the defunct general league of roman catholic caucuses (abrk) party later the roman catholic state party (rksp), the catholic people's party (kvp) and founder of catholic national party (knp) before rejoining the catholic people's party now merged into the christian democratic appeal (cda) party and nonprofit director.