The guy is Jamie Dingman, a New York marketing exec.
A Swedish photo agency came to TMZ with what they said was a photo of the two, kissing and hugging outside Elin's apartment in Sweden. TMZ has seen the photo -- but the agency decided it wanted to hold it ... at least for now.
Jamie's dad, Michael Dingman, is a very wealthy investor. Jamie specialized in Russian private equity funds and he also owned an Indy car-racing team.
He reportedly dated Bridget Moynahan, Tom Brady's baby mama. He was also linked to Princess Madeleine of Sweden, but the New York Post says they were just friends. It does, however, provide a Swedish connection.
The photos have appeared on a Swedish website Expressen.tv as part of a video package. Good luck translating.