Harley Pearce, from Marlborough in Wiltshire, died at the scene of the crash on the A417 Old Birdlip Hill in Witcombe, Gloucester, Gloucestershire Police said.
Emergency services were called to the scene at about 2.30pm on October 16.
The 21-year-old was the driver of the tractor, police said.
His family have paid tribute to a “cherished son and devoted brother”.
Speaking at a press conference in Spain ahead of City’s Champions League clash with Villarreal, manager Pep Guardiola said: “On behalf of Man City, for the tragic news, the loss for Stuart Pearce and his wife and family about their son.
“I know there are no words for this huge tragedy, but our deepest love to him and his family.”
The Manchester City manager’s message follows tributes from several Premier League teams for which Stuart Pearce formerly played.
Nottingham Forest posted on X saying: “We are deeply saddened to learn of the passing of Harley Pearce.
“The thoughts of everyone connected with Nottingham Forest are with Stuart and his family at this truly difficult time.”
West Ham United posted on X: “We are saddened to hear of Harley Pearce’s passing.
“Everyone at the Club sends their deepest condolences to Stuart and his family at this tragic time.”
Meanwhile, Manchester City posted on X saying: “Everyone at Manchester City sends their love and thoughts to Stuart and his family at this very difficult time.”
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In a tribute released by the police, the family said: “Our family is truly shocked and utterly heartbroken at the loss of our cherished son and devoted brother, Harley.
“A soul who left an unforgettable imprint on all who knew him.
“He was a golden boy with an infectious smile, and this shocking tragedy will leave a huge hole in the hearts of those who were fortunate enough to have known him.
“With a quiet, understated strength and deep kindness, we are so proud of the young man he had become, exhibiting a wonderful work ethic and entrepreneurial spirit in the farming industry.
“He will always be our shining star. Rest in peace, our beautiful son and brother. You will never ever be forgotten.”
Investigating officers are appealing for anyone who witnessed the collision or has any relevant dashcam footage to get in touch.
Information can be provided to police online, quoting incident 284 of October 16.