Arthur St Leger, 1st Viscount Doneraile

[1] Sir John St Leger, Baron of the Court of Exchequer (Ireland), was his half-brother, the son of his father's second marriage to Aphra Harflete, an heiress from Ash in Kent.

[2] John, who was not highly regarded as a lawyer, was said to have owed his success largely to his brother's support, and the two were close throughout their lives.

[4] His most noted contribution to public life was during the debate in the Irish House of Lords on the much-debated case of Sherlock v Annesley in 1719.

The Irish peers, infuriated by this challenge to their authority, summoned the judges to appear before them and after a short, ill-tempered hearing committed them to prison for three months.

His daughter Elizabeth Aldworth achieved fame as "The Lady Freemason", and was also the progenitor of the Viscounts Doneraile of the second creation.