« Reply #2 on: Sunday 26 November 17 21:04 GMT (UK) »
Hi Lauren,
My understanding is that registrars were the people who obtained information of the death from the informant in your case the father John, and they were the ones who maintained a record and have done since 1837 of all births-marriages-deaths in their district (the information from those records were then indexed into quarters). So finding the registrar most likely won't help you find information about your family.
It looks like John Roberts informed the registrar that his son died at home. Not sure whether you have this information but the family are listed on the 1861 Census at Mount Pleasant, Conway -
John Roberts (Head) - b. 1812 - Engine Driver - Looks like Amlwch, Anglesey
Mary Roberts (Wife) - b. 1815 - Caernarvon, Caernarvonshire
Thomas Roberts (Son) - b. 1845 - Butcher - Bangor, Caernarvonshire
William Roberts (Son) - b. 1847 - Tailor - Bangor, Caernarvonshire
Lisa
Flintshire - Hughes, Price, Simon, Messham, Griffiths, Powell, Tattum, Eaton, Roberts, Pownall, James, Enion
Denbighshire - Morris
Cheshire - Walley, Hough, Pridden, Jackson, Lawson, Rosedale, Rigby
Lancashire - Smith, Caunce, Williams, Eaton, Watkinson, As(h)croft, Wilson
Cumbria - Twentyman, Borrow, Bownas, Mitchell
London - Liddell, Wilkes, Hart
Midlands - Smith, Fox, Hopton, Timson