1. English: Derived from the Old French word "rous", meaning "red-haired" or "ruddy". It was originally used as a nickname for someone with red hair.
2. Welsh: Derived from the Welsh word "rhys", meaning "ardour" or "passion". It was often used as a patronymic surname, indicating descent from someone named Rhys.
3. Irish: Derived from the Gaelic word "ruadh", which also means "red-haired". It was used as a nickname for someone with red hair, similar to the English origin.
The Rouse surname has been present in England since the Middle Ages and has spread to other parts of the world, including the United States, Canada, and Australia, through migration and settlement.