As I mentioned, I'm fairly sure that I've found your Ward family although some of Joseph Patrick's Canadian information didn't make it very easy to find them!
Starting with his attestation papers & Army records. Best clue is father's name and occupation which has made it possible to track them down in Belfast. He's given his mother as Katherine/Catherine Kelly and this is only partly correct- mother was
Catherine McKenna and stepmother was Mary
Kelly! Since he was so young when his mother died and probably thought of Mary as his mother it's not surprising.
Michael Ward (c1865/c1852 Co.Derry-17 Aug.1925), son of John, m.1 (6 Oct.1883 Belfast)
Catherine McKenna (d.1892?), dau. of Edward, m.2 (29 Jan.1893 Belfast)
Mary Kelly (c1875/c1868 Co.Tyrone-aft.1911), dau. of Matthew
? death Catherine Ward (c1864-1892)
https://familysearch.org/ark:/61903/1:1:FTCR-YY4 1901- clerk, Ogilvie St.
http://www.census.nationalarchives.ie/pages/1901/Down/Ormeau/Ogilvie_Street/1211894/ 1910- Ward, Michael, street inspector, 1 Oberon Street
http://www.lennonwylie.co.uk/alphanames1910TUVWXYZ.htm 1911- house cleaning inspector, Oberon St.
http://www.census.nationalarchives.ie/pages/1911/Down/Ormeau/Oberon_Street/227251/ 1915- 2 New St. Belfast
1918- Ward, Michael, Corporation inspector, 320 Woodstock Rd
http://www.lennonwylie.co.uk/alphanames1918TUVWXYZ.htm Ward Michael of Knocknagow Fruithill Park Upper Falls county Antrim house cleansing inspector died 17 August 1925 Administration (with Will) Belfast 13 October to Matthew Aloysius Ward commercial traveller. Effects £931.
1.
Margaret Ward (26 Sept.1884 Belfast)
2.
John Edward Ward (15 May 1885 Belfast-aft.1911)
3. daughter (23 Oct.1886 Belfast)
4.
Joseph Ward (2 Nov.1887 Belfast)
5. daughter (23 May 1888 Belfast)
6.
James Ward (2 July 1890 Belfast)
7. daughter (9 Dec.1892 Belfast-1892?)
Is this same child? Katherine died 1892
https://familysearch.org/ark:/61903/1:1:FTCT-MTL1.
Matthew Aloysius Ward (23 Dec.1893 Belfast-10 July 1956) m. Cecilia
Ward Matthew Aloysius of Tudor House Cranleigh Surrey died 10 July 1956 at Royal Surrey County Hospital Guildford Surrey Probate London 18 September to Cecilia Ward the widow. Effects in Northern Ireland £679 10s. Re-sealed Belfast 5 December.
2.
Michael Francis Ward (14 Dec.1895 Belfast-aft.1911) birth: male
3.
Eileen Margaret Ward (27 Sept.1903 Belfast-aft.1911) Birth: lleen
I wondered if one of the un-named daughters was the sister Bridget but no luck in getting her in 1901 or 1911 so far.