The Brit killed along with a father-of-two whom he hit after plunging seven storeys has been named locally as Anthony Holmes.
Antonio Gonzalez, 43, was enjoying a late-night drink with friends at a five-star hotel in the Costa del Sol resort of Marbella when the 49-year-old Brit fell on top of him.
Both men died instantly following the plunge from a balcony.
The tragedy occurred at the upmarket Melia Don Pepe Hotel, just before 2am on Saturday.
The Brit had been staying at the hotel with his family.
Police said they were still investigating the incident and did not confirm if they believed the holidaymaker jumped or fell by accident.
The hotel, one of the most exclusive in the area, declined to comment.
Mr Gonzalez ran a well-known gym in Marbella specialising in fitboxing, which is a mix of boxing and kickboxing practiced to music.
He had two children and was married to a woman who worked as a receptionist at another hotel in the resort.
She is understood to have been by his side when he was killed and narrowly escaped serious injury.
Local reports said the dead man was with friends, who were looking at the hotel to see if it was suitable for their daughter’s communion.
A friend of the couple said: “He was a lovely bloke who lived a normal life.
“His wife was beside him when it happened. I can’t imagine the pain and shock she’s experiencing right now.”
A witness told a local paper Antonio’s friends had been singing ‘Happy Birthday’ to one of the group moments before the tragedy took place.
A hotel guest said: “I haven’t been able to sleep a wink thinking about the man who the holidaymaker landed on.”
It is not known where in the UK Mr Holmes was from.
He is thought to have been on holiday with relatives.
A spokesman for the National Police in Malaga said: “I can confirm two men have died at a hotel in Marbella after one plunged from the seventh-floor and landed on top of another.
“We are investigating.”