Gertie is a common nickname for Gertrude.
The most used nickname for grandma is probably "Nana".
A common nickname for Gricelda is Gris.
A modern nickname for grandma could be "Gigi," "Nana," or "Mimi."
"The Me Decade" is often used as a nickname for the 1970s due to the era's focus on individualism and self-discovery.
Jerries was a nickname for Germans in the 1940's
Yes
No, Germans are not called "moths", though they have been called Krauts, Squareheads, Gerries (or Jerries, whichever you prefer), Jackboots, Heinies, Fritzs, Nazis, Boches, and Rhine monkeys.
Germans, and Nazis, possibly Gerries as the British called them, but overall the same things we called them (unless it was in French, then I have no idea in the world).
US soldiers referred to Germans as "Krauts" during World War II.
Germans wer often called "Huns" by their enemies in World War I
The word Nazi is itself a nickname for National Socialist. Please see the related question below.
Axis powers
US Marines..Germans called them "Devil Dogs".
Yes, one of many slang nicknames used.
Germans wer often called "Huns" by their enemies in World War I
Krouts, because Germans often like Sour Krout