Sir David Rowat Barclay and Sir Frederick Hugh Barclay (both born 27 October 1934), commonly referred to as the "Barclay Brothers", are British businessmen. The identical twin brothers have very substantial business interests primarily in media, retail and property. The Sunday Times Rich List of 2015 estimated their wealth at £6.5 billion. They have earned a reputation for avoiding publicity, and are often described as reclusive.Sir David's son, Aidan, manages their UK businesses.