Baron Rathfarnham is in Baron Ireland.
On 29th January 1686 Adam Loftus 1st Viscount Lisburne [aged 39] was created 1st Viscount Lisburne and 1st Baron Rathfarnham. Lucy Brydges Viscountess Loftus [aged 34] by marriage Viscountess Lisburne.
On 15th September 1691 Adam Loftus 1st Viscount Lisburne [aged 44] died. Viscount Lisburne and Baron Rathfarnham extinct.