It mostly happens to "Deutschland", actually: Germany (English), Allemagne (French), Tyskland (Danish), Německo (Czech). Only in the Netherlands (and Flanders)

It mostly happens to "Deutschland", actually: Germany (English), Allemagne (French), Tyskland (Danish), Německo (Czech). Only in the Netherlands (and Flanders) is the name used that they chose for themselves (Duitsland). This apparently confused the English so much that they called the inhabitants of the Netherlands "Dutch".