Speaking ahead of the start of the new Formula One season, the 37-year-old admitted he intends to incorporate his mother's maiden name, Larbalestier, alongside Hamilton.
Hamilton's parents, Anthony and Carmen, separated when he was two years old.
The Mercedes driver invited his mother to Windsor Castle last December, to watch him receive his knighthood from Prince Charles.
He said: "I am really proud of my family's name. My mum's name is Larbalestier and I am just about to put that in my name.
"I don't really fully understand the whole idea that when people get married the woman loses her name and I really want my mum's name to continue on with the Hamilton name."
It is unknown when the change will become official with Hamilton adding: "Hopefully soon. We are working on it."
The Brit is preparing for his 16th season in Formula One and will be looking to avenge last year's controversial championship loss to Red Bull's Max Verstappen.
However, Hamilton does have worries about the car, fearing that Mercedes have fallen behind Red Bull and Ferrari.
"Bahrain is going to be tough," he added. "I am really hoping that when I get on the call this evening - with my team at Brackley and Brixworth - they have found some tricks and ways to extract more from this car.
"There were a lot of cars that looked fast in testing. Alfa Romeo looked fast, Valtteri (Bottas) looked quick, and obviously the Red Bull looked ridiculously fast - but we are the best team."
The first race of the season will take place at the Bahrain International Circuit on Sunday, March 20.