Hi, I have lurked on this group for a while, but think it is worth mentioning a few things I have been researching, in case it interests or helps anyone.
William David Owen (born William Owen) 1874-1925 was a Welsh schoolteacher who became an author, penning the classic 'Madam Wen' which was published in Welsh in 1925, just a fortnight before he died. I have just completed a biography of the man and am about to publish the 184 page work as 'The Rhosneigr Romanticist'. isbn 9780956296207
The book also includes the first ever (abridged) English translation of 'Madam Wen', along with an earlier story he wrote entitled 'Elin Cadwaladr' (also in Welsh, and also being published as an abridged version in English for the first time).
Owen travelled to Gloucestershire, (Joy's Green), Derbyshire, (Clay Cross) and London (Muswell Hill), before returning to Anglesey where he settled in Rhosneigr.
Owen married Edith Gwendolen Empsall in 1904, but they had no children.
Owen's sisters were both spinsters, although one of them, Ellen (known as Nelly), worked for several years for Florence Nightingale and the Verney family.
The website
www.rhosneigrromanticist.co.uk will tell you a bit more.
Am happy to help anyone with any linked research (there are lots of Owen cousins) if you post here or email me via Rhosneigr Publishing.
I am also interested in receiving any further snippets of information - particularly as several lines of enquiry remained stubbornly unanswered.
You will also find a large collection of Rhosneigr images on our sister website
http://www.sheffieldpostcard.co.uk/catalogue/Rhosneigr