The Master Surname Index (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists these possible names;
Elizabeth MCNULTY, - 20 Feb 1952 and
Thomas J. MCNULTY. 24 Jun 1873 - 13 Jan 1938
buried next to each other in the St. Patrick cemetery in Lethbridge.
Perhaps her siblings are list in the obituary,you can find an obituary for Elizabeth here,then click on Newspaper Indexes.http://lethbridgeags.theboss.net/
For further research please contact the AGS Research Services Committee of the Edmonton Branch, http://abgensoc.ca/