Isabel Grubb (20 September 1881 – 1972) was an Irish historian, who studied the Quakers in Ireland.
Isabel was born in 1881 to Joseph Ernest Grubb and Hannah Rebecca Jacob, corn merchants and Quakers in Carrick-on-Suir, Ireland.
[1] She gained her master's degree from the University of London in 1916 with a thesis about Irish Quakerism: "Social conditions in Ireland in the seventeenth and eighteenth centuries, as illustrated by early Quaker records.
Grubb worked within the Society and as curator and clerk in the Historical Library of the Religious Society of Friends in Ireland, resigning only in 1955, as the commute from where she lived in Waterford had become too much for her.
[2][3][4] As a historian and Quaker, Grubb was the main authority on the subject in Ireland.