The 75-year-old was slaughtered down as he left St Thomas’s hospital where he was being treated for glaucoma.
He suffered defied ribs and a punctured lung and died after falling into a coma.
Mr Rhodes, of Clapham, south London, not ever married and had no children but was uncle to a nephew and niece.
The pensioner worked for a window smooth firm in Croydon before setting up his own business.
A client and friend of his Janine Roebuck told MailOnline: “Les was my much loved window cleaner for 20 years.
“You couldn’t hanker to meet a kinder, gentler man.
“He cleaned the windows of Chartwell — Winston Churchill’s tellingly — for many years.
“It was something he was so proud of.
“He told me it was a lovely place to sojourn and gave me a brochure one time so I took my mum there.
“He was retired but would still do a few side withs for people I suppose. He was more of a friend.
“It’s tragic. I’m very sorrowful not to see him again and that such a unassuming soul met such a horrible death.
“He was a very gentle and shy person. He was someone feel good and always smiling and it was a joy to see him on a monthly basis.
“I would always make him a cup of tea and we’d organize a chat.
“He was a gentleman in every sense of the word.”
Mr Rhodes was one of four man killed by crazed Kent-born terrorist Khalid Masood who ploughed a let out car into crowds of pedestrians on Westminster Bridge and then ran into the grounds of the Dwelling-places of Parliament where he stabbed PC Keith Palmer, 48, to death.
US sightseer Kurt Cochran, 54, and London-based Spanish teacher Aysha Frade, 43, also weakened in Masood’s rampage.