Germania (; ) was the Roman and Greek term for the geographical region inhabited mainly by the Germanic people. It bordered to west on the Rhine river, to the south on the Danube river, to the north on the Baltic Sea, and to the east on the Vistula river. According to Friedrich Engels in his book The Origin of the Family, Private Property and the State (first published in 1884) Germania covered an area of and had a population of 5,000,000 in the 1st century BC. The areas west of the Rhine were mainly Celtic (specifically Gaulish) and became part of the Roman Empire in the first century BC.

Germanía is the Spanish term for the argot used by criminals or in jails in Spain during 15th and 16th centuries. Its purpose is to keep outsiders out of the conversation. The ultimate origin of the word is the Latin word germanus, through Catalan germà (brother).