Madog consolidated the possessions of his father, Prince Gruffudd Maelor, and the territory he ruled became known as Powys Fadog in his honour, the remainder of the old kingdom formed Powys Wenwynwyn.
Madog collected his father's assets, Prince Gruffudd Maelor, and the region under his rule came to be called Powys Fadog in recognition of him. The remaining part of the former kingdom was named Powys Wenwynwyn.