I've got a copy of the 1918 absent voters' list for limerick city and county at home and there are several don worth/ dunworth names on it. I haven't looked at this area of the family for quite a while and can't even remember the connection. Sorry I'm travelling in Asia for the next couple of weeks and won't be able to look it up until I get back. In the meantime just type in the following to google : 1911 census ireland. You should get taken to the national archives of Ireland and they have the full 1901 and 1911 census free online. That's where you'll find the info. They also have copies of original images. The first name of Maurice pops up a lot in my research, although cant remember why. More recently, the Irish military archives have released the 1922 census for the national army of Ireland. A Maurice Donworth appears on that.