A dukedom refers to the territory or land governed by a duke, who is a high-ranking member of a noble or royal family. It can also refer to the title held by a duke. Full definition
Most Dukedom Tennessee defensive driving courses are offered in a hotel room, restaurant or other location. (drivinguniversity.com)
The Marlborough moniker given to the soap above by D.R. Harris alludes to a dukedom and the very same noble house from which Winston Churchill was descended (google «Duke of Marlborough» and «Blenheim Palace» — the latter being only one of a couple non-royal estates in England to be called a palace and a mansion I'm sure most gents will say they've seen in film or on television more than once!). (primandprep.com)