The region now known as Leilior was originally occupied by two tribes—one Midron (the Duindir) and one Northron (the Rhuadir).

The Rhuadir occupied much of what is now known as “the Highlands”, the northern panhandle of the country. They, too, have been absorbed into the mixture of racial stocks that form modern Leiliorans. However, it is their culture that lives on in much of modern Leilior. They live on in various family names and northern customs, as well as their brogue-heavy dialect known as “Highland Leilioran”.