Can you receive a Knighthood after death? About posthumous Knighthoods

The short answer is no, although there is one recent notable exception.

Novelist Martin Amis received a knighthood after his death in May 2023, although he was informed that he was to receive the honour a few weeks before he died. The knighthood was dated the day before his death to adhere to the convention that honours can’t be conferred posthumously.