Perogy, Pierogi, Pyrohy

Perogies are a traditional Eastern European food, commonly found in countries such as Poland, Ukraine, and Russia.  The typical perogy is made with unleavened dough and stuffed with cheese, potato and onion, although there are many variations.  There are also different spellings for theses delicious dumplings; in Poland it is pierogi (the singular being pierog), in Ukraine it is pyrohy, and in Canada it is usually called perogy (dumbed down a bit, I suppose).  My grandfather was Ukranian, and my grandmother Polish, so I will be diplomatic here and use the simplified, Canadian preferred "perogy".