Surname Сикст (Sisto 
, Sixte 
, Sixt 
) , in the world, is quite a common cognomen. The last name Сикст is characteristic of Cayman Islands, where it is quite a common surname, Hong Kong, where it is quite a rare surname, and Austria. Measured by absolute frequency, this name is the most popular in Germany, Italy, and the United States. Likewise, Сикст is the forename as well as the last name.