One of my ongoing interests in Luxembourger genealogy is the community in Meriden, Connecticut. Every so often I'm able to turn up another reference to that community - often by looking for people who list their nationality as German on the census.
The 1900 census lists John and Johanna Theison as natives of Germany. John is 66; Johanna is 62. John's family, like other Luxembourger families in Meriden, are factory workers. I can't find either on the 1880 census. Which makes me wonder - were they Luxembourger and where did they come from?