What does Sixtus mean?
How popular is Sixtus?
Sixtus is an uncommonly occurring first name for males and also an uncommon surname for both adults and children. (2000 U.S. Census)
The only prominent related form of Sixtus (not ranked) ranked in the Top 1000 is Sixto. This relation of Sixtus was favored as a baby name during 1940-1949 (#946) and is now less common. Below is a graphed comparison of the usage of Sixtus and related names. (2014 Birth Statistics)