Hi at Last we May be getting Somewhere With your Family.The Daughter Was Mary Florence Dagg,I have listed below

 

There was one Family of Dagg in Dublin in 1911

 

Residents of a house 21.2 in Portland St. North (Rotunda, Dublin)
Surname Forename Age Sex
Dagg James 48 Male
Dagg Elizabeth 44 Female
Dagg Mary Florence 19 Female
Dagg William Albert 14 Male

 

There were also 2 James McGuires

 

Residents of a house 2 in Corduff (Blanchardstown, Dublin)
Surname Forename Age Sex
McGuire Jane 50 Female
McGuire Richard 26 Male
McGuire John 24 Male
McGuire James 22 Male
McGuire Alice 24 Female

Residents of a house 61.3 in Bride St. (Mansion House, Dublin)
Surname Forename Age Sex
McGuire Margaret 34 Female
McGuire Mary 21 Female
McGuire Catherine 19 Female
McGuire James 17 Male
McGuire Elizabeth 16 Female
McGuire Thomas 14 Male