My father was Dutch and my mother was Irish – a genuine case of orange and green.
The village from where my maternal grandfather came has disappeared completely but I have visited one of my mother's cousins and his daughters in Mayo. Like just about every other ex-pat Irish family/clan, mine can claim a royal connection. Someone even made a romanticised film about this princely figure; he came to an untimely end while rebelling against the English (as they did then). My mother's maternal aunt emigrated to Australia and that branch of the family has been in touch with and some members have met the English family. I think there were other family members, besides me, who emigrated, possibly to Canada and New Zealand.
My father's family left Utrecht at the beginning of World War I when he was about three years old. There are records of people with the same surname, which is unusual in the Netherlands as well as in the UK, going back to the nineteenth century, but there is some suggestion that the family originated further east, perhaps in Bohemia (now the Czech Republic, I think). I have never got round to investigating further although one of my English-Dutch cousins and one of my more distant Dutch-Dutch cousins have an interest in genealogy. The only one of my father's siblings who lived in the Netherlands and whose children and grandchildren do, was born in London.