I live in Rotterdam, but I am not born and raised here. My son is, he feels like he his a real ‘Rotterdammer’ and is a great fan of Feyenoord. You know our last name is Ruijgrok. There is a society, ‘Vereniging Ruychrock History’, which does research on the family history of all Ruijgroks (whichever orthography is used). It also publishes a website (http://www.vereniging.ruychrockhistory.nl/ned/) on which all findings can be found. I was reading this site with my son and we stumbled on a story about the City Coat of Arms of Rotterdam and the famliy Ruijgrok. It seems the colour green in the City Coat of Arms is taken from the Family Coat of Arms of the Ruijgroks who lived in Castle Weena. The City of Rotterdam wanted to add the land of this castle to the city and in return the family demanded they changed the colour red in the City Coat of Arms to green, from the Family Coat of Arms. The City of Rotterdam has a flag which is green because of the colour in the City Coat of Arms. So in short: I am (my family is) responsible for the colour green in the flag of Rotterdam. This is My First influence on the history of a city! Who can also say that?
Source picture: http://www.engelfriet.net/Alie/Hans/kasteelweena.htm