In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Brynbychan like this:
BRYNBYCHAN, a township in Rhuddlan parish, Flint; near Rhuddlan. Pop., 91.
For now, the location is simply that of Rhuddlan, as Brynbychan has not been located on a topographic map. The search included checking on the map of Rhuddlan published in the 1868 Parliamentary Boundary Commission report, in our collection of historical maps.
A Vision of Britain through Time includes a large library of local statistics for administrative units. For the best overall sense of how the area containing Brynbychan has changed, please see our redistricted information for the modern district of Denbighshire. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Brynbychan and units named after it.
GB Historical GIS / University of Portsmouth, History of Brynbychan, in Denbighshire and Flintshire | Map and description, A Vision of Britain through Time.
Date accessed: 11th December 2013
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Brynbychan".