According to The Telegraph, Steve Jobs was almost given an honorary knighthood by the (now former) British Prime Minister Gordon Brown. But, Jobs declined an invitation to speak at a Labour Party conference, which royally offended Brown, who then rejected the proposed knighthood.
“Apple has been the only major global company to create stunning consumer products because it has always taken design as the key component of everything it has produced. No other CEO has consistently shown such a commitment.” - Labour MP
Honorary knighthoods aren’t uncommon (Bill Gates has even been knighted) but it is still a tremendous honor.