Rick
Mongoose
That was part of the whole concept - when you talk about a specific hereditary noble, you are really talking about a family. The titular noble and his immediate family group (wife, children) are at the top of the family and are the ones everyone sees as the nobility, but he is going to have cousins and other family members looking after business interests, acting as advisors, go-betweens and liaisons and doing the 101 things that need to get done behind the scenes for the noble to administer his region. Very much like a hereditary family business functions.