Clasina Jacoba Wassenaar
- Born: 11 Apr 1913, Leiden, , Zuid-Holland, Netherlands
- Marriage (1): Gerrit Jan Dijkerman on 10 Mar 1936 in Surabaja, , Jawa Timur, Indonesia
- Marriage (2): Aad van der Eijk on 20 Apr 1949 in Den Haag, , Zuid-Holland, Netherlands
- Died: 1982, Durban, KwaZoeloe-Natal, Zuid Afrika at age 69
Another name for Clasina was Sien Wassenaar.
Clasina married Gerrit Jan Dijkerman, son of Gerrit Jan Dijkerman and Unknown, on 10 Mar 1936 in Surabaja, , Jawa Timur, Indonesia. (Gerrit Jan Dijkerman was born on 7 Oct 1911 in Purworejo, Purworejo, , Jawa Tengah, Indonesia and died on 27 Feb 1942 in Javazee a/b Hr Ms Java.)
Clasina next married Aad van der Eijk on 20 Apr 1949 in Den Haag, , Zuid-Holland, Netherlands. (Aad van der Eijk was born on 26 Apr 1918 and died on 19 Jul 1985 in Pinelands, Cape Town, , Western Cape, South Africa.)