Family name Humbertus (Humbertus 
, Умберто 
, אומברטו 
) , across the world, is a very rare cognomen. The surname Humbertus is characteristic of Japan, where it is a very rare surname, Colombia, and Spain, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Japan, Colombia, and Russia. Likewise, Humbertus is the forename as well as the last name.