Ludolf de Jongh or Ludolf Leendertsz. De Jongh (1616 – 1679) was a Dutch painter, known for his genre scenes, hunting scenes, history paintings, landscapes, cityscapes and portraits.
Karl Henrik Ludolf Nielsen, also known as Ludolf Nielson, (1876 – 16 1939) was a Danish composer, violinist, conductor, and pianist. Today he is considered one of the most important Danish composers of the early 1900s (together with the more famous Carl Nielsen).