The Jossa is a 32 km long river in the Spessart, which flows in the Main-Kinzig district in southern Hesse. It rises in the Jossgrund district of Lettgenbrunn and flows into the middle course of the Sinn from the right in the Jossa district of the Sinntal municipality. It is a low mountain stream rich in fine material, with silicate content.
The name consists of the old word Jasa and Old High German aha. They mean shower or precipitation and water. The river name was passed on to the towns of Burgjoß and Marjoß (both originally Jazaha) as well as to the later founded Jossa and gave the Joßgrund district, the Jossgrund municipality and the former Jossatal municipality their names.
The Jossa spring is in the middle of Lettgenbrunn. It is a small spring into which the Villbach flows, which is often considered the upper course and originates about two kilometers further northwest near Villbach. However, this often has no water in the summer, so the actual watercourse begins at the Jossaquelle. The spring was used to supply Lettgenbrunn with drinking water until 1951. On September 16, 2007, the redesign of the Jossaquelle was completed and a natural sandstone with a reference to the spring was placed.
Source: Wikipedia