Jaap De Hoop Scheffer's birth name is Jakob Gijsbert de Hoop Scheffer.
Pi Scheffer's birth name is Johannes Scheffer.
Dick Scheffer's birth name is Isac Komkommer.
Jaap van Heusden's birth name is Jelle Jaap van Heusden.
Jaap Stobbe's birth name is Jacob Stobbe.
Jaap Stam's birth name is Jackob Stam.
Jaap Pop's birth name is Jacobus Johannes Hermanus Pop.
Jeremy Hoop's birth name is Jeremy Woolley Hoop.
Wyn Hoop's birth name is Winfried Lssenhop.
Jaap van de Merwe's birth name is Jacob Marinus van de Merwe.
Jaap Van der Poll's birth name is Jacobus Gerardus Wilhelmus Van Der Poll.
Frits Wester's birth name is Frits Jaap Wester.
Robert Westerholt's birth name is Robert Jaap Westerholt.