Allgood was born on 30 October 1880 at 45 Middle Abbey Street in Dublin, then still part of the United Kingdom of Great Britain and Ireland at the time, a daughter of Margaret ( Harold) and compositor George Allgood. Her mother was Catholic, while her father was Protestant.Who Was Who in the Theatre: 1912-1976, volume 1 A-C, page 36; compiled from editions originally published annually by John Parker, this 1976 version by Gale Research Company. She had two baptisms, a Catholic baptism on 3 November 1880 and a Church of Ireland (Protestant Anglican) baptism on 21 November 1880.Catholic baptismal record confirming date of birth as 30 October 1880, irishgenealogy.ie. Accessed 22 April 2022.
