describe the households of nobles?
Royal household officials were largely responsible for the governance of the realm, as well as the administration of the household.
Medieval household
The households of medieval kings were in many ways simply aristocratic households on a larger scale: as the Burgundian court chronicler Georges Chastellain observed of the splendidly ordered court of the dukes of Burgundy, "after the deeds and exploits of war, which are claims to glory, the household is the first thing that strikes the eye, and which it is, therefore, most necessary to conduct and arrange well." In some ways though, they were essentially different. One major difference was the way in which royal household officials were largely responsible for the governance of the realm, as well as the administration of the household. 
high official in the household of a medieval king Those were often filled by men of rank: sons of the lord's relatives, or his retainers.
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Medieval household [SEP] Noble households
The households of medieval kings were in many ways simply aristocratic households on a larger scale: as the Burgundian court chronicler Georges Chastellain observed of the splendidly ordered court of the dukes of Burgundy, "after the deeds and exploits of war, which are claims to glory, the household is the first thing that strikes the eye, and which it is, therefore, most necessary to conduct and arrange well." In some ways though, they were essentially different. One major difference was the way in which royal household officials were largely responsible for the governance of the realm, as well as the administration of the household.