Dumpling is a broad classification for a dish that consists of small pieces of dough (made from a variety of starch sources), often wrapped around a filling (as in ravioli or wontons). The dough can be based on bread, flour, or potatoes, and may be filled with fish, meat, sweets, or vegetables. They may be cooked by boiling, frying, simmering, or steaming.
A historic recipe found on One Year and Thousand Eggs
Take flour and eggs & knead together / take figs, raisins & dates & put out the stones & blanched almonds & good powder & bray together / make coffins of the length of a span / put thy stuffing therein, in every cake his portion/ fold them & boil them in water & afterward roast them on a griddle & give forth.
From Laud MS. 553, Volume I
A traditional Norwegian soup recipe found on matprat.no
Traditionally soups like this were made with hens, not chicken. Clear soup like this is lean food, still filling and satisfying. In addition, it is very reasonably priced food. Just remember that hen meat need a relatively long cooking time.