Tiobóid na Long Bourke, 1st Viscount Mayo Irish chieftain, noble, 23rd Mac William Íochtar and Viscount Mayo (1567–1629) (1567–1629) Parents Grace O'Malley Risdeárd an Iarainn Bourke Children David Bourke Richard Bourke Miles Bourke, 2nd Viscount Mayo Partners Maud Sligo