Justina McMurdo (1786-1869) was born in Jamaica according to the 1851 British census. She was married to George Jeffreys, Esq. (1789-1768). They lived at Glandyfi Castle (alt. Glan-dyfi) near Machynlleth on the border between Montgomeryshire and Cardiganshire in Wales. Justina named her youngest son Charles Alured Jeffreys which has led some researchers to think that Justina may be related to Alured Charles McMurdo.