We were stumped.
Soho to us means gay bars, sex shops, the nut man in Berwick st, fixing flats on The steps, falling asleep in the Square on slow days, and nearly getting doored every time hustling up Wardour.... but the foundation of its name was beyond us.
So we asked our mate - Wiki.
The area which is now Soho was grazing farmland until 1536, when it was taken by Henry VIII as a royal park for the Palace of Whitehall. The name Soho first appears in the 17th century. Most authorities believe that the name derives from the old soho! hunting call (Soho! There goes the fox!, etc.).[2][3][4][5] The Duke of Monmouth used soho as a rallying call for his men at the Battle of Sedgemoor,[6] half a century after the name was first used for this area of London.
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By the mid 1800s all respectable families had moved away and prostitutes, music halls and small theatres had moved in. In the early 1900s foreign nationals opened cheap eating-houses and it became a fashionable place to eat for intellectuals, writers and artists. From the 1930s to the early 1960s, Soho folklore states that the pubs of Soho were packed every night with drunken writers, poets and artists, many of whom never stayed sober long enough to become successful; and it was also during this period that the Soho pub landlords established themselves.
The Soho name has been imitated by other entertainment and restaurant districts such as Soho, Hong Kong, SoHo, New York, and Palermo Soho, Buenos Aires.
Thanks Wik.