Here's the link to your Holden family on the 1901 census http://www.census.nationalarchives.ie/pages/1901/Dublin/Tall...
, and for 1911 census http://www.census.nationalarchives.ie/pages/1911/Dublin/Tall...
You will note that on 1901 census, William and Anne said they were born in Wicklow, but in 1911, were born in Co. Dublin, so they were probably born on the border of both counties.
There are other Holden's on these censuses in both Dublin & Wicklow, who may be related.
Here is a link to the baptisms of 3 of the Holden children http://churchrecords.irishgenealogy.ie/churchrecords
And here is the marriage of William Holden and Ann Cuniam
Name: Anne Cuniam
Date of Registration: Oct-Nov-Dec 1878
Registration district: Rathdrum
FHL Film Number: 101253
(same details for William Holden, so a match).
If you get this cert, it will give the names of their parents.
There are Holdens in Wicklow, according to Griffiths Valuation http://www.askaboutireland.ie/griffith-valuation
. One of them might be William's father, or at least a relative.