Rhosgobel, glossed as "russet village or 'town' (enclosure)", is evidently a compound of rhosc ("brown") and gobel ("walled house or village, town"). The name of the house was perhaps a reference to its resident, the Brown Wizard.
Sindarin
rhosgobel
place name. Russet Village
The home of Radagast (LotR/256), translated “russet village or town” (RC/241), a combination of rhosc “russet” and gobel “village”.
Conceptual Development: In Lord of the Rings drafts from the 1940s, this name was also N. Rhosgobel, translated “Brownhay” (TI/164).