Ignacio Echeverria, an HSBC expert in fighting money- laundering who lived in London, was one of eight killed in Saturday's attack that saw three men mow down people in a van before going on a stabbing spree in the Borough market area.
The 39-year-old had rushed over to help a woman being assaulted and tried to defend her with a skateboard he had with him, prompting British media to dub him the "skateboard hero."
"He was a good man, an exemplary citizen who on this tragic evening had the courage to face the terrorists to try and save the life of a young woman who was being attacked," he told reporters.
Echeverria was listed as missing for close to four days after the attack as British authorities identified the body, leading to an excruciating wait for his family members.
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Spain was highly critical of the sluggish pace of the identification process.
This prompted British authorities to allow them to be with their son and brother earlier.
His body will be repatriated on Saturday, a foreign ministry spokesman said.