Edward Adolphus Ferdinand Seymour, Earl St. Maur, also 13th Baron Seymour in his own right, was a British aristocrat and soldier.

A writ in acceleration, commonly called a writ of acceleration, is a type of writ of summons that enabled the eldest son and heir apparent of a peer with more than one peerage to attend the British or Irish House of Lords, using one of his father's subsidiary titles, during his father's lifetime. This procedure could be used to bring younger men into the Lords and increase the number of capable members in a house that drew on a very small pool of talent.