>
Cognomen Mosterd (Mustum , Mosterd , Moustarde ) , all around the world, is a rare surname. The cognomen Mosterd is characteristic of Netherlands, where it is quite a rare surname, Czechia, where it is a rare surname, and Australia. Not in comparison with a country's population, it is commonest in Netherlands, South Africa, and Australia. Much less frequently, Mosterd is the forename as well as the last name.