great move... i think
The great-grand child to parents who immigrated from Japan,
I believe you mean the Grand Canyon, which is located in Arizona.
Great grand aunt.Great grand aunt.Great grand aunt.Great grand aunt.
Your grand niece's son is your great grand nephew, or, some would say, your great great nephew. You are his great grand aunt or great grand uncle, or, some would say, great great aunt or great great uncle.
Great or not, it is certainly grand.
The son of a great grandson is a great greatgrandson.
In general terms, "large" in French typically means "big" in English, while "grand" can mean "great" or "grand" in English. However, context is important as these words can have various nuances and uses in different situations.
your great-great-grandfather
Yes, your niece's daughter is your grand niece. You are her great aunt or great uncle.
the great perfume in fashion today.
it means big, large, tall, great,... depending on the context