Pack-Beresford attended Rugby School, and then Christ Church, Oxford, graduating with a Bachelor of Arts in 1887.

[1] Pack-Beresford married Alice Harriet Cromie Lyle (c.1869 – 2 June 1918) in 1891, with which he had one adopted daughter, Vera.

[3] Aside from his interest in zoology, Pack-Beresford became the estate owner at Fenagh House in 1881,[4] and went on to serve as the High Sheriff of Carlow, the Deputy Lieutenant, and Justice of the Peace.

[8] Due to failing eyesight, Pack-Beresford had to give up his work towards the end of his life, as it relied heavily on the use of microscopes.

[8] His zoological collections are now housed in the Natural History Museum, Dublin and his papers are held by the Royal Irish Academy.