I have come across a George Frederick Winstanley , a Dublin barrister , who appears in The Post Office Directory of 1843 , residing at Philipsburgh Strand. I have also found in Landed Estates Court Rentals particulars of property , including a house in Philipsburgh, which mention George Frederick Winstanley Wallis , Mary Lititia McGhee and Charles Sommerville M'Alester. I googled George Frederick Winstanley and among the results found this page:
http://www.rootschat.com/links/01hzk/ " Charles M'Alester married 1828 Mary Barbazon ,only child of Edward Lyon Lieut RN by Anna Catherine, eldest daughter and co heiress of George Frederick Winstanley of Philipsburgh , Co Dublin."
I think it is likely that Anna Catherine, Mary Andrews and Eleanor Margaret Winstanley are sisters and daughters of George Frederick Winstanley but more research would be needed to confirm.
Edit : Maybe someone on the Ireland board who knows more about Irish records than I do could help . You could ask to have your topic moved if wish.
Edit : George Frederick Winstanley ,
aged 61, of Dublin died 10 Mar 1850 , see irishgenealogy.ie , and I think it must be he in the 1843 directory. An earlier George Frederick Winstanley is listed in the Will Index with a date of 1801.