planned trip to Cherbourg

I spent a school exchange week in Cherbourg-Octeville in 1987.
Ever since I wanted to go there again. Now it’s getting time….
Hard to find informations about the hosts. I just remember the first Name.
Sophie had 2 brothers and 1 sister. They lived in a house a bit outside of Octeville.
The Du Nguyen was my correspondant and visited me in Holzminden. Since that is a very common name, there is no chance to google it.