Harry and Meghan's son is the first cousin on their father's side for Prince William and Kate's children, Prince George, 5, Princess Charlotte, 4, and one-year-old Prince Louis.

Kate noted that this time of year will be a happy season for the two families, as Prince Louis's birthday is April 23, Princess Charlotte's is May 2 and Harry and Meghan's son's is May 6.

\"PHOTO:Britains
Ben Stansall/AFP/Getty Images
PHOTO:Britain's Prince William, Duke of Cambridge and Britain's Catherine, Duchess of Cambridge wave as they leave after attending the launch of the King's Cup Regatta, at the Cutty Sark in Greenwich, south east London, May 7, 2019.
>

Prince George was born in July.

\"It's such a special time, obviously with Louis and Charlotte just having their birthdays, it's such a great time of year to have a baby,\" Kate said, according to ABC News royal contributor Omid Scobie.

View this post on Instagram

A post shared by Kensington Palace (@kensingtonroyal) on Dec 14, 2018 at 3:00am PST

The Duchess of Cambridge also revealed that even she and William do not yet know the name of their new nephew.

\"As William said, we look forward to meeting him and finding out what his name is going to be,\" Kate said.

Harry, 34, said Monday that he and Meghan were still deciding on a name for their son, who was born at 5:26 a.m. local time and came around one week after his due date.

\"That's the next bit,\" Harry said in brief remarks he made Monday near the couple's Frogmore Cottage home, where Meghan, the baby and Meghan's mom, Doria Ragland, are now.

\"PHOTO:
Steve Parsons/Pool via AFP/Getty Images
PHOTO: Britain's Prince Harry, Duke of Sussex, speaks to members of the media at Windsor Castle in Windsor, England, May 6, 2019, following the announcement that his wife, Meghan, Duchess of Sussex has given birth to a son.
>

The public is expected to get their first look at Harry, Meghan and their son Wednesday when they step before the cameras for the first time as a family of three. Buckingham Palace has not yet released details of the photo opportunity.

Nearby Harry and Meghan's Frogmore Cottage home in Windsor is the baby's great-grandmother, Queen Elizabeth II, who could be among the first members of the royal family to see the baby. Queen Elizabeth is in residence now at Windsor Castle, a short walk from Frogmore Cottage.

\"PHOTO:
Hannah Mckay/Reuters, FILE
PHOTO: Britain's Prince Harry and Meghan, Duchess of Sussex, visit a boarding house for girls run in Asni, Morocco, Feb. 24, 2019.
>

The palace though has not said whether the queen already has or plans to visit Harry, Meghan and the baby.

Miles away, in Germany, the newborn's paternal grandfather, Prince Charles, also spoke out about the new arrival.

“We couldn’t be more delighted at the news and we’re looking forward to meeting the baby when we return,\" Charles said Tuesday while visiting Berlin with Camilla, the Duchess of Cornwall.

Harry and Meghan's baby, whose name has not been released is the fourth grandchild for Prince Charles.

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