Citations:Downtonian

Noun: "(slang) a fan of the television series Downton Abbey"

 * 2012, Alice Wyllie, "Television: Downton Souffle Has Sunk", Scotland on Sunday, 21 October 2012:
 * Stop winding all the clocks, Downtonians. This marks a distinct shift in a programme in which various threats (cancer, financial ruin, stained dinner jackets) lurked in dusty corners for about half an episode before being quickly swept away like Carson doing the spring cleaning.
 * 2013, Georgette Gouveia, "Getting Down With 'Downton'", Wag, March 2013, page 24:
 * (As all Downtonians know, this, too, turns out to be felicitous when after much travail, cousin Matthew and Lady Mary happily wed at the beginning of season three.)
 * 2014, "Americans rekindle its 'Downton Abbey' affair", Kuwait Times, 5 January 2014, page 39:
 * From coast to coast, "Downtonians" will be at the edge of their chesterfields, keen to see what's next for the Crawleys in 1920 after the unexpected deaths of two beloved young members of the patrician family.
 * 2014, "Music Listings", One & Other, Issue #12, January/February 2014, page 64:
 * For all Downtonians, perk your ears up: Elizabeth McGovern (Lady Cora) will be losing her corset this February in favour of leathers and a mic stand to play her husky, country-esque vocals with her band Sadie and the Hotheads.

Adjective: "of, related to, or characteristic of the television series Downton Abbey"

 * 2013, Georgette Gouveia, "Getting Down With 'Downton'", Wag, March 2013, page 24:
 * But it was the fifth earl, George Herbert, who lent Highclere an air of "Downtonian" drama, marrying a Rothschild heiress to ensure the estate's survival and in 1922 fund the expedition that unearthed Egyptian Pharaoh Tutankhamun's tomb.
 * 2013, Jill Vejnoska, "Books: Atlanta novelist's latest uses popular TV series as plot point", The Press (Atlantic City), 7 April 2013:
 * Yet other aspects of the story are timeless - and tantalizingly Downtonian.