1) Dutch surname 
Rademaker is a Dutch occupational surname originally meaning wheelwright or wainwright. There are a large number of spelling variations, the most common of which are (with number of people in the Netherlands and Belgium in 2007 combined): Raaijmakers (4086), Raaymakers (301), Rademaker (3094), Rademakers (2037), Raemaekers (939), Raeymaekers (2112...