Ponsonby, John William, 4th Earl of Bessborough
Ponsonby, John William, Visct. Duncannon
Duncannon, John Williams, Viscount
Duncannon, Lord
Bessborough, John William Ponsonby, Earl of
Duncannon of Bessborough, John William Ponsonby
Viscount Duncannon
Ponsonby, John William, hrabia Bessborough
wicehrabia Duncannon