What does Klaas mean?
Klaas /klaas/ as a name for boys is of Greek derivation, and the meaning of the name Klaas is "people of victory". Klaas is an alternate spelling of Klaus: transcription of Claus. Klaas is also a form of Nicholas (Greek).
(male) Keaas, Klacee, ..
(female) Klaassie, Klakas, ..
How popular is Klaas?
Klaas is an uncommonly occurring first name for males but a very prominent last name for all people (#20711 out of 150436, Top 14%). (2000 U.S. Census)
Popular alternative forms of Klaas (not ranked) are Claus, Klaus and Nicholas (#57 via latest list). These relations of Klaas were popular with parents 2 decades ago (usage of 1.53%) and have become much less common since (usage 0.35%, 77% less), with the form Nicholas becoming less trendy. Displayed below is a comparison of the history of the boy name Klaas and related names. (Top 2000 Names, 2014)