The 36-year-old British man was one of 129 people killed after a wave of coordinated incidents. He was one of around 80 people shot by gunmen at the Bataclan concert hall, where the popular rock band had been performing.
“It is with huge sorrow that we can confirm that our beloved Nick lost his life at the Bataclan last night,” his family wrote in a statement. “Nick was not just our brother, son and uncle, he was everyone’s best friend – generous, funny and fiercely loyal.”
Alexander’s girlfriend, a woman named Polina Buckley, initially wrote on Twitter early Saturday that she was trying to find him after the incident.
She later shared a tribute to her late love.
“You are and always will be the love of my life, Nick Alexander,” she wrote.
An American woman named Helen Wilson told the U.K. paper the Telegraph that she was with Alexander after shooting broke out at the venue.
Wilson, who the Telegraph reported was wounded in both legs, said she attempted to give mouth-to-mouth resuscitation to Alexander and held him.
“His back was to me and I couldn’t see what happened and I tried to keep him talking and then I tried to give him mouth-to-mouth resuscitation and they [the gunmen] were just sort of in the shadows and they would shoot if anyone said anything,” she said.
Alexander also held roles as a merchandise manager on tours for bands like Sum 41, Panic! at the Disco and the Black Keys, according to Rolling Stone.
Blur’s Damon Albarn told Ian Birrell that he was saddened by Alexander’s death.
“Nick’s death is immensely sad,” he said. “The fact that he seems to have given his life to save another will be a lasting testament to what a lovely guy he was.”
Both Albarn and Birrell worked with Alexander when he sold merch for their project, Africa Express, in 2012.
On Friday a rep for the Eagles of Death Metal confirmed to PEOPLE on Friday that no band members had been killed, but at the time couldn’t confirm the status of all crew members.
The Islamic State, or ISIS, reportedly claimed responsibility for all the attacks on Saturday.