Hi ,
The connection for Johnsderry is my family from Ringsend and they were Roman Catholics living in Shanlongford which is near Cam, Boleran. My grandfather William (Liam) died in the early eighties , he married Rosemary McAteer from Kilrea in Derry and had the children as below
William _Limavady , Patrick _Ringsend , Josephine_Ringsend , Anthony _Dungiven, Philomena _Limavady , Marie _Limavady ,Martin _Limavady
One of the brothers John went to America , Thomas and Eliza McKeever were my great grandparents who I never saw.
http://www.census.nationalarchives.ie/pages/1911/Londonderry/Ringsend/Shanlongford/652553/http://www.census.nationalarchives.ie/pages/1901/Londonderry/Ringsend/Belraugh/1516698/The McKeever connection is great great granny McKeever
http://www.census.nationalarchives.ie/pages/1911/Londonderry/Ringsend/Shanlongford/587727/There are now generations of Boyces in Castlebar Co.Mayo , Castlefinn Donegal , Raleigh NC USA , Dungiven and Limavady.
Hope this fills in a few gaps,
Martin Boyce