Cognomen ライカ (ライカ 
, Rijker 
) , globally, is a rare family name. The last name ライカ is characteristic of Japan, where it is a rare surname, Netherlands, and the United Kingdom, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Japan, Netherlands, and the United States. Very seldom, ライカ is the forename as well as the last name.