[yesbabyyes]

I was born in Roslagen so I may be biased, but that is likely where the name Rus comes from.

Roslagen comes from skeppslag, skepp as in ships, administrative regions which were required to each contribute one fully manned and equipped ship along with supplies.

A similar levy was taxed inland, called hundare (hundreds). There are three still remaining, the Chiltern Hundreds in Buckinghamshire.