Meaning and name origin
Klaas is not a popular first name for males but a very popular surname or last name for all people (#30157 out of 88799, Top 34%) (2000 U.S. Census).
Displayed below is a comparison of the popularity of the boy name Klaas and its variant forms. The only popular variation form ranked in the Top 1000/100 is Nicholas (#57). (2014 statistics).