Wikipedia
                    Koolhaas
                    
                        
                
                                                                    Koolhaas is a Dutch surname. Notable people with the surname include:
- Anton Koolhaas (1912–1992), Dutch journalist, novelist, and scenario writer
 - Rem Koolhaas (born 1944), Dutch architect
 - Caspar Koolhaas (1536–1615), Reformed theologian