Susan Elizabeth Mary Jeune, Baroness St Helier, was a London County Council alderman and the wife of Francis Jeune, 1st Baron St Helier.

Francis Henry Jeune, 1st Baron St Helier,, known as Sir Francis Jeune (1891–1905), was a British judge. He was President of the Probate, Divorce and Admiralty Division of the High Court of Justice (1892–1905) and Judge Advocate General (1892–1905). According to, F. L. Wiswall Jr., "For better or for worse, it is fair to say that Sir Francis Henry Jeune had a greater influence upon the development of the Law of Admiralty than any single common lawyer since Coke."