Donald Trump Jr., 39: Donald Trump Jr. is the incoming President's eldest son with his first wife, Czech model Ivana Trump. He currently works alongside his brother Eric as a trustee of The Trump Organization. According to sources, Trump Jr is not expected to have a role in his father's administration. He drew ire during the campaign for agreeing to an interview with a prominent white nationalist and for comparing Syrian refugees to Skittles candy, The Guardian reported. He is married to model Vanessa Kay Haydon since 2005 and they have five children.