A couple of other McMurdy births from Family Search -  useful to have these for naming pattern clues, if any!
Name   Jane Mcmurdy
Gender   Female
Birth Date   12 Oct 1872
Birthplace   , , IRELAND
Father's Name   Andrew Mcmurdy
Mother's Name   Dorothy Stuart
Name   Mary Isabella McMurdy
Event Type   Birth
Event Date   06 Jun 1866
Event Place   Magherafelt, Magherafelt, Ireland
Event Place   Drumance Ballyscullion, Magherafelt, Ireland
Gender   Female
Father's Name   Andrew McMurdy
Mother's Name   Dorothea Stewart McMurdy
Name   William John McMurdy
Event Type   Birth
Event Date   13 Jun 1871
Event Place   Magherafelt, Magherafelt, Ireland
Event Place   Magherafelt
Gender   Male
Father's Name   Andrew McMurdy
Mother's Name   Dorothea Stewart McMurdy
Name   David James McMurdy
Event Type   Birth
Event Date   11 Jan 1868
Event Place   Magherafelt, Magherafelt, Ireland
Event Place   Drumanel Ballyscullion, Magherafelt, Ireland
Gender   Male
Father's Name   Andrew McMurdy
Mother's Name   Dorthia Stewart McMurdy
Confirmation of fathers' names 
Name   Andrew McMurdy
Event Date   17 Aug 1865
Event Place   Magherafelt, Magherafelt, Ireland
Event Place   Magherafelt, Magherafelt, Ireland
Father's Name   David McMurdy
Spouse's Name   Doretha Stewart
Spouse's Father's Name   John Stewart