Sarah O'Neill (died 1640) (d. 1640) Parents Hugh O'Neill, Earl of Tyrone Siobhan O'Donnell Catherine O'Neill, Countess of Tyrone Children Evelyn Magennis Siblings Conn O'Neill Shane O'Neill Ellis MacDonnell, Countess of Antrim Catherine O'Neil Henry O'Neill unknown daughter O'Neill Margaret O'Neill Brian O'Neill Hugh O'Neill, 4th Baron of Dungannon Margaret O'Neill Partners Arthur Magennis, 1st Viscount Magennis of Iveagh