Inger is not a German word, regarding surnames it's a suffix.
Family names in Germany developed during the medieval times. At first people had only a first name. In a small village where people knew each other it wasn't much of a problem. But later, when the citys increased and people had to distinguish between ten Peters, they added individual characteristics to the name.
So when one of the Peters was a smith, they called him "Peter the smith", later just "Peter Smith". In that case the person was named after his profession and also his descendants beared that name.
But there were more characteristics than only professions which defined a person's name.
Regarding the suffix "-inger" it's quite possible that the person was named after his or her hometown. Many places in South Germany and Austria have the suffix "-ing". Such as Altoetting. So if someone came from this place, he would be named after it. "Peter from Altoetting" or "Peter the Altoettinger", short: "Peter Altoettinger".
In an English context it would be like "Peter from London", "Peter the Londoner" and the short form "Peter Londoner".
But like I said, mostly towns/townships in South Germany and Austria have the suffix "-ing", accordingly mostly people from there have an "-inger" in their surnames.
From that town
"Zimmermann" with two nn's on the end, is a German surname. When Germans immigrated they often changed their names slightly so that they could avoid discrimination. It means "carpenter"
This name is lingustically German and is mainly found in some German-speaking areas of Switzerland. It is also found in Germany. As for ancestry, it's often unwise to attach too much importance to surnames.
I may be wrong here, but I think Harmsen is a Dutch variant on the German surname Hermann. The name is also found quite often in the Scandinavian countries, possibly rather more in Denmark than in the others.
Jewish surname is Israel, which is much less common. Jewish thought often divides Jews into three groups: Kohein, Levy and Israel. Israel basically means the rest of us. Variations on this surname include Israeli, Yisrael, Yisroel and most notably Disraeli (the surname of a Jewish-born British Prime Minister and Earl who was baptized as a child but apparently retained some sense of Jewish identity). weekend.co.il
Contact your nearest German consulate. Citizenship questions are often complex.
The surname Kissinger is of German origin. It is believed to be derived from the Middle High German word "kuss," meaning "kiss," and the suffix "-inger," which often denoted a connection to a particular place or occupation.
Lichtfuss is typically a German surname, so it is often associated with German nationality.
"Seubert" is a surname of German origin. It does not have a specific meaning in German; surnames often originated from occupations, locations, or personal characteristics.
"Zimmermann" with two nn's on the end, is a German surname. When Germans immigrated they often changed their names slightly so that they could avoid discrimination. It means "carpenter"
Rosenzweig is a German surname often held by those with Jewish ancestry.
The correct spelling is "Donitz." It is a German surname.
The name Krass is of German origin. It is often a surname and literally means 'prawn' or 'shrimp' in Middle Low German.
As a firstname, Hirsch is a variant of the Yiddish Hersh.It coincides with the modern German word for "Hart; Male Deer."Similarly, it is also used as a German and Jewish surname.
"Kothe" is a German surname (family) name. It is often associated with algebra in the context "Köthe-Bochner function spaces" The link below explains what I can not.
The last name Zeufeldt appears to have German origin. It may be a variation or anglicized form of a German surname. The prefix "Ze-" is common in German surnames, often indicating a location or topographical feature.
This name is lingustically German and is mainly found in some German-speaking areas of Switzerland. It is also found in Germany. As for ancestry, it's often unwise to attach too much importance to surnames.
I may be wrong here, but I think Harmsen is a Dutch variant on the German surname Hermann. The name is also found quite often in the Scandinavian countries, possibly rather more in Denmark than in the others.