Surname Сейс (Sayce 
, Сейс 
) , in all the world, is a rare cognomen. The family name Сейс is characteristic of the United Kingdom, where it is a rare surname, Australia, and New Zealand. Measured by absolute frequency, the name is most common in the United Kingdom, Australia, and the United States. Much less frequently, Сейс is the forename as well as the last name.