housecarl
noun
house·carl ˈhau̇s-ˌkär(-ə)l 
: a member of the bodyguard of a Danish or early English king or noble
Word History
Etymology
Old English hūscarl, from Old Norse hūskarl, from hūs house + karl man; akin to Old English ceorl churl
First Known Use
before the 12th century, in the meaning defined above