Complex sentence: It has been reported that Eugenie is dating her distant cousin, aristocrat Jack Brooksbank, the great grandson of Sir Edward Clitheroe Brooksbank, 1st Baronet.
Split into simpler sentences: It has been reported that Eugenie is dating her distant cousin, aristocrat Jack Brooksbank, scion of the Brooksbank baronetcy. He is the great grandson of Sir Edward Clitherow Brooksbank, 1st Baronet.