) is a freestyle

Freestyle swimming

Freestyle is an unregulated swimming style used in swimming competitions according to the rules of FINA. The front crawl stroke is almost universally used during a freestyle race, as this style is generally the fastest...

 swimmer. He is of Dutch

Netherlands

The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

 origin. His parents, both born and raised in Netherlands

Netherlands

The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

, moved to Spain

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 in 1978, and settled in Sabadell.

Both Olaf and his younger brother Aschwin, a backstroke

Backstroke

The backstroke, also sometimes called the back crawl, is one of the four swimming styles regulated by FINA, and the only regulated style swum on the back. This has the advantage of easy breathing, but the disadvantage of swimmers not being able to see where they are going. It is also the only...

 swimmer, represented Spain at the 2004 Summer Olympics

Swimming at the 2004 Summer Olympics

Swimming at the 2004 Summer Olympics took place in the Olympic Aquatic Centre with the athletes competing in 32 events. There was a total of 937 participants from 152 countries competing.-Medal table:-Men's events:...

, where Olaf was eliminated in the semi finals of the Men's 200m Freestyle.

After the 2005 World Aquatics Championships

2005 World Aquatics Championships

The 2005 World Aquatics Championships or the XI FINA World Championships were held in Montreal, Quebec, Canada from July 16 to July 31, 2005...

 in Montreal, Canada Olaf decided to leave Spain, and started to train in the Netherlands

Netherlands

The Netherlands is a constituent country of the Kingdom of the Netherlands, located mainly in North-West Europe and with several islands in the Caribbean. Mainland Netherlands borders the North Sea to the north and west, Belgium to the south, and Germany to the east, and shares maritime borders...

. In the spring of 2006 he decided to stay in Eindhoven, and announced that he would compete for the Netherlands in the future. After obtaining consent from the Spanish authorities, he represented Holland for the first time at the 2006 European Championships in Budapest, Hungary.