Trump Jr. was born on December 31, 1977, in Manhattan, New York City, to Ivana and Donald Trump. He has two younger siblings, Ivanka and Eric. He also has two half siblings, Tiffany, from his father's marriage to Marla Maples, and Barron, from his father's current marriage to Melania Trump. Through his father, Trump Jr. is a grandson of Fred Trump and great-grandson of Elizabeth Trump, who founded what became the Trump Organization. As a boy, Trump Jr. found a role model in his maternal grandfather, Miloš Zelníček, who had a home near Prague, where he spent summers camping, fishing, hunting and learning the Czech language.