Germany Sigismund 4th Child Vicky &amp; Fritz 3 / Prince Sigismund &quot;Siggy&quot; (Franz Friedrich Sigismund) (15 Sep 1864-18 Jun 1866) Germany. He died from meningitis age 1 year, 9 months. Sigismund was the 4th child of Princess Victoria Adelaide &quot;Vicky&quot; (1840-1901) UK &amp; King Frederick III (1831–1888) Germany.