Johan Jacob Mackay (1909-1995) (1909–1995) Parents Johanna Elisabeth Blaauw Dirk Rijnhard Johan Mackay Children Donald Rynhard William Mackay John Hugo Mackay Marie Louise Mackay Derrik Phillipe Mackay Johanna Elizabeth Mackay Siblings Anna Maria Mackay Eric Rynhard Alexander Mackay Helene Gérardine Mackay Baron Johan Hugo Mackay Patricia Mackay Partners Elizabeth Elder Holman