who manage the affairs of royal houses
Answers
The Royal Households of the United Kingdom are the collective departments which support members of the British royal family. Many members of the Royal Family who undertake public duties have separate households. They vary considerably in size, from the large Royal Household which supports the Sovereign to the household of the Duke and Duchess of Cambridge and the Duke and Duchess of Sussex, with fewer than ten members. The lesser households are funded from the Civil List annuities, paid to their respective royal employers for their public duties, and all reimbursed to HM Treasury by the Queen.
In addition to the royal officials and support staff, the Sovereign's own household incorporates representatives of other estates of the Realm, including the Government, the Military, and the Church. Government whips, defence chiefs, several clerics, scientists, musicians, poets, and artists hold honorary positions within the Royal Household. In this way, the Royal Household may be seen as having a symbolic, as well as a practical, function: exemplifying the Monarchy's close relationship with other parts of the Constitution and of national life.
Answer:
a royal household or Imperial household