A great Dane is a breed of large dog. (You knew that.) What is it called in Denmark? The Danish word for "great" is "store"; the word for "Dane" is "Dansker." But in Denmark, the big dog is not a "store Dansker," but a "grand Danois," which is French for "great Dane."
And if you think the great Dane originated in Denmark, think again. It originated in Germany, where it is known as "Deutscher dogge," which is German for "German mastiff."
Why am I talking about dogs? This question is about accuracy. But in order to be accurate, you have to be alert for inaccuracies. It is easy to be inaccurate if you are not thinking about the words.
Pennsylvania Dutch people are not Dutch, but German. . . New South Wales is not part of Wales. . . The Louisiana territory is not the same as the modern-day state of Louisiana. . . there were French settlers in the German Coast of Louisiana. . .
Perhaps you have thought "this family name is the same as mine. We must be related." Or "this name is spelled a bit differently. We are not related."
As you work on your family mysteries, imagine a great Dane reminding you to be careful with names.