Jacob Rothschild, 4th Baron Rothschild, OM, GBO, (1936 –2024), was a British peer, investment banker, and member of the Rothschild banking family. Rothschild held important roles in business and British public life, and was active in charitable and philanthropic areas.

He was the eldest son of Victor Rothschild, 3rd Baron Rothschild and Baroness Barbara Hutchinson.  Raised in a background that intertwined Jewish heritage with the tenets of Orthodox Judaism through his mother’s conversion, Rothschild’s education spanned from Eton College to Christ Church, Oxford. 

Jacob Rothschild was married to Serena Mary Dunn, Baroness Rothschild, who was the daughter of Sir Philip Dunn and Lady Mary Sybil St. Clair-Erskin (daughter of the 5th Earl of Rosslyn, Scotland). (Coincidence: Her grandmother was half-sister to June Capel, daughter of Diana Lister and the 14th Duke of Westmorland.) 

Jacob and Serena had four daughters and one son, Nathaniel, who is now 5th Baron Rothschild.