They were developed by the Royal Navy circa 1830 in the UK
Belguim
Duffel, named after the Belgian town where the style & fabric of the bag originated.
Duffel bags are named after the town of Duffel, located in Brabant, Belgium. "Duffel" came to mean the name of a heavy cloth produced by the town. This cloth made excellent carrying bags, and soon any bag produced in the same style became known as a duffel bag.
Originally a coarse woollen cloth with a thick nap. Named after the town in Belgium where the cloth was made in the 17th Century
Italy (in a town named Pisa)
Norway has a town named Hell.
The only country that has a town named Blackwood is Wales. Blackwood is a Welsh town located approximately in the South Wales Valley region, near Newport and Cardiff.
Germany, the hamburger is named after the town in Germany, hamburg.
There are a number of saints named Teresa, each from a different town or country, so you need to be specific.
Norway has a town named Hell. It is located in the municipality of Stjørdal in Trøndelag county.
Mullingar is located in the country of Ireland. It's name means "the left-handed mill", and it is the county town of County Westmeath. The town was originally named Maelblatha.
Germany