John Francis Stanley Russell, 2nd Earl Russell, known as Frank Russell (12 August 1865 – 3 March 1931), was the elder surviving son of Viscount and Viscountess Amberley, and was raised by his paternal grandparents after his unconventional parents both died young. He was the grandson of the former prime minister John Russell, 1st Earl Russell and elder brother of the philosopher Bertrand Russell. He was married three times, lastly to Elizabeth von Arnim, who caricatured him in her novel Vera. Despite his landmark achievements in other respects, this Earl Russell is most famous for being tried for bigamy in 1901, after which he was known to Edwardian society as the "Wicked Earl".
More information on the Wikipedia page .