Symington said: “Dad was born and bred in Middlesbrough and he was so proud of his roots here so this would have meant the world to him.
“He was such a passionate advocate for Middlesbrough and its people – I just wish he could have been here.”
The council said Peacock engaged with more than 1,000 people living with dementia during his time as an ambassador for the club.
A spokesperson said dementia-friendly training was now an annual requirement for the football club.
Middlesbrough Mayor Chris Cooke said Peacock’s work after his “long and illustrious” footballing career ended “was no less important”.
He said: “Alan Peacock was enormously proud of his home town and that feeling was reciprocated.”
