The guy on the left is Toni Rohdam, Hillary's youngest brother, who supposedly died June 7, 2019, at the age of 64. His death was announced by his sister on Twitter on June 8:
"We lost my brother Tony last night," Clinton wrote. "It's hard to find words, my mind is flooded with memories of him today. When he walked into a room he'd light it up with laughter. He was kind, generous, & a wonderful husband to Megan & father to Zach, Simon, & Fiona. We'll miss him very much."
— Hillary Clinton (@HillaryClinton) June 8, 2019
No cause of death was given.
Tony Rodham and Nicole Boxer, daughter of U.S. Congresswoman Barbara Boxer from California, were married on May 28, 1994, in a ceremony at the White House that was attended by 250 guests.