[1] Mann was born in Norwich in 1710 and was brought to Ireland as a child, being supported by Lord Chancellor of Ireland Robert Jocelyn, 1st Viscount Jocelyn.
It was a standing joke in Dublin that Mann was frequently mistaken for Jocelyn, since Mann had far more of the grand manner than Jocelyn, who was notably modest and unassuming.
[2] Mann was educated at Trinity College, Dublin, obtaining a scholarship in 1730.
He was buried in Ballinaspic, then his remains were transferred to Saint Fin Barre's Cathedral in 1861.
[6] He had no children of his own but adopted his nieces Frances and Susannah Mann.