Sidmouth was the son of Reverend Henry Addington , 2nd Viscount Sidmouth , eldest son of Prime Minister William Leonard Addington and 1st Viscount Sidmouth . was the son of Reverend Henry Addington , 2nd Viscount Sidmouth , eldest son of Prime Minister William Leonard Addington and 1st Viscount Sidmouth .
Sidmouth merupakan anak kepada Pendeta Henry Addington, Viscount ke-2 Sidmouth, anak sulung kepada Perdana Menteri William Leonard Addington dan Viscount ke-1 Sidmouth. ialah anak kepada Pendeta Henry Addington, 2nd Viscount Sidmouth, anak sulung Perdana Menteri William Leonard Addington dan 1st Viscount Sidmouth.