Adolf Hitler was born on 20 April 1889 in Braunau am Inn, a town in Austria-Hungary (in present-day Austria), close to the border with the German Empire. He was the fourth of six children to Alois Hitler and Klara Poelzl (pölzl–1860). 1907hitler s older—Siblings, Gustav, ida And—otto died in. infancydolf Hitler was born on 20 April 1889 in Braunau am Inn, a town in Austria-Hungary (in present-day Austria), close to the border with the German Empire. He was the fourth of six children to Alois Hitler and Klara Poelzl (pölzl–1860). 1907'hitler s older—Siblings, Gustav, ida And—otto died in. infancy