Coordinates: 50°14′50.7″N 10°31′19″E / 50.247417°N 10.52194°E / 50.247417; 10.52194 Brennhausen (German: Burg Brennhausen) is a castle in the municipality of Sulzdorf a.d.Lederhecke in the district of Rhön-Grabfeld in Bavaria in Germany. It is located the Haßberge Nature Park.
Josef Braun explains the name Brennhausen in his place-names book as the houses by a water source, meaning, in this case, a spring. Braun bases his statement on the fact that immediately next to the settlement a stream springs forth which flows into the river Saale. Braun discovered that the form Brenn- is a written form, changed from the spoken dialect, which is based on the old form Brünn.
Dr. Heinrich Wagner presents a very different view in his Historischen Atlas von Neustadt/Saale (Historical Atlas of Neustadt/Saale). Wagner believes that the origination of the name had nothing to do with the houses by a water source, but rather that the name of the estate is derived from the old German given name, Brunicho. Under this scenario, the founder of Brennhausen used his own name, as was the custom of that time, for the naming of Brunechenhusen.