Found to date plus details of missing children on 1911 census
William HILLAN b Sept 3 1865 d Mar 06 1937 at 61 Bulfin Road
m Jul 04 1892 in a Registry Office on License
Sarah CONNOLLY b c 1880 d Mar 31 1944
Rosanna b May 29 1892 at 38 N William Street; m William CONLON 1920
Maria Christina b Dec 21 1897 at 7 Hardwick Place; m Slyvester MOFFAT 1933
Margaret Mary b Aig 20 1899 at 19 Synnott Place;
Elizabeth Mary b May 28 1901at U Gardiner Street
Mathew b Aug 15 1903 at Postmahon Lodge, Dolphin's Barn
Edward Thomas b May 28 1905 at 1st Lock, Grand Canal; d Dec 04 1909
Thomas Gerrard b May 21 1908 at Postmahon Lodge, Dolphin's Barn; d Oct 18 1909
William Patrick b Mar 16 1911 at Postmahon Lodge, Dolphin's Barn
The parents of William HILLAN were William HILLAN and Maria CHALK
Maria died on Mar 23 1895 aged 65 at 25 N William Street;
shown as married and her daughter Maria GLENN was the informant
The address appears quite often
Its possible that William's death was at Simpsons Hospital as HILLIARD in 1904
It matches a cenus record in 1901 at the same hospital