Cockneydom

From Cockney +‎ -dom.

Cockneydom (uncountable)

1. (archaic) The home or region of Cockneys i.e. London
2. Cockneys, collectively.
   • 1850, “The Lord Mayor in Ireland”, in The Comic Almanack: An Ephemeris in Jest and Earnest, Containing Merry Tales, Humorous Poetry, Quips, and Oddities (2nd Series), London: John Camden Hotten, […]; New York, N.Y.: Scribner, Welford and Co., →OCLC, page 316:

     Then to win the hearts of his new subjects the King of Cockneydom would, doubtlessly, have spoken in the richest brogue he could manage.

• “Cockneydom”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.