Last name Ноул (Knowl 
, Ноул) , in all the world, is a very rare family name. The family name Ноул is characteristic of Greece, where it is a very rare surname, the United States, where it is an extremely rare surname, and the United Kingdom. Measured by absolute frequency, it is commonest in China, the United States, and Greece. Much less frequently, Ноул is the forename as well as the last name.