@Setanta,
When the first Roma came to Germany about 1400, they were called Secanen(at least in documents from Magdeburg, Hamburg, Lübeck, Wismar, and Rostock),
sechanos se nuncupantes in Latin (and in German nomeden sik de Secanen).
Later, they were called as well with the Greek term "athinganoi" ("pariah") or "Egytians".
They called themselves either
Roma (mainly in Eastern Europe),
Sinti im Central/Western Europe,
Manouches in France), and
Calé in Spain.
Since 1871, Sinti and Roma got the German nationality every in the German Reich (before, just a few German states allowed them to get the resp. nationality).
200.000 to 500,000 Roma were deliberately killed or died through starvation or lack of medical attention during the Holocaust (
Porajmos in Romani). That's between 25% and 50% of all Roma of that time!