Colbert mentioned the prince’s friends called him “Haz” before the duke retorted: “My wife calls me Haz, so you can’t call me Haz.”
But during their bombshell six-part Netflix series documentary, which premiered last month, Meghan is regularly seen calling Harry simply as “H”.
This has led US-based freelance writer and royal commentator R.S. Locke to take to Twitter in an attempt to get to the bottom of the confusion.
She wrote: “First Corden and now Colbert. Everyone wants to call Prince Harry by his nickname but…’My wife calls me Haz, so you can’t call me Haz.’
“Your birth name is Henry, your father and brother call you Harold, some people call you H, your friends call you Haz. What is Haz? Is that short for hazardous?”
Harry retorted: “My wife calls me Haz, so you can’t call me Haz. Harry, Haz, Baz, Hazza, Spike, Bazzarooney, it’s all there.”
The Duke of Sussex arrived on stage to from the audience of “Harry, Harry, Harry” before he got the crowd going again by offering them all some tequila, after admitting himself: “I need a drink.”
The prince sipped on a glass of tequila throughout the interview, having been offered a ‘cocktail’ by the chat show host when he took his seat.
Harry’s book ,Spare, which sees him lambast the Royal Family on several occasions, went on sale on Tuesday and quickly became the fastest selling non-fiction book ever.
The bombshell shot into the record books with 400,000 hardback, e-book and audio format copies being snapped up, its publisher said.
