SANTA BARBARA, Calif. - Prince Harry and his wife, Meghan Markle, welcomed their second child Friday, June 4, with the birth of a healthy girl, Lilibet “Lili” Diana Mountbatten-Windsor.

A spokesperson for the Duke and Duchess of Sussex said the baby weighed 7 pounds, 11 ounces, and that mom and baby are fine.

The little one’s first name, Lilibet, is a nod to Prince Harry’s grandmother, Queen Elizabeth II, and her nickname. Her middle name is in honor of Prince Harry’s mother, Diana. The baby is the eighth in line to the British throne.

No photos of the newborn or the Sussexes accompanied the announcement.

The baby is featured in one of the illustrations in Ms. Markle’s new children’s book, “The Bench,” which debuted this week. The book was inspired by a poem she wrote for her husband on Father’s Day2019, the month after their son, Archie, was born.

Ms. Markle stated that the book explores “the special bond between father and son” as “seen through a mother’s eyes.” While the book is dedicated to Prince Harry and Archie and features an illustration of the two red-heads sitting on a bench feeding the family’s chickens, it also has an illustration of a baby cradled in the arms of Ms. Markle, who is standing in a vegetable garden wearing a sunhat, white T-shirt and jeans.

The book was illustrated by California artist Christian Robinson.

In early 2020, Prince Harry and Ms. Markle announced they were quitting royal duties and moving to North America, citing what they said were the unbearable intrusions and racist attitudes of the British media. They live in a $14.5 million home in Montecito, a posh area near Santa Barbara, Calif., and raise rescue chickens, which they showed during their blockbuster interview in March with Oprah Winfrey.

A media release said the children’s book depicts a “diverse group of fathers and sons.”

“My hope is that ‘The Bench’ resonates with every family, no matter the makeup, as much as it does with mine,” Ms. Markle stated.

No information is available on how much Ms. Markle received in advance for the book, or whether any of the proceeds of its sale will go to charity. But branding experts suggested she may have received about $700,000.

The birth comes after the couple’s explosive TV interview with Oprah Winfrey in March. The couple described painful discussions about the color of their first child’s skin, losing royal protection and the intense pressures that led her to contemplate suicide.

Buckingham Palace said the allegations of racism made by the couple were “concerning.” The royal family said the issue would be addressed privately.

Ms. Winfrey and Prince Harry recently collaborated on the Apple TV+ mental health series “The Me You Can’t See.”

Prince Harry and American actor Meghan Markle married at Windsor Castle in May 2018. Their son Archie was born a year later.

Last year, Ms. Markle revealed that she had a miscarriage in July 2020, giving a personal account of the traumatic experience in hopes of helping others.

Months before the miscarriage, Prince Harry said the royal family cut him off financially at the start of 2020 after announcing plans to step back from his roles. But he was able to afford security for his family because of the money his mother, Princess Diana, left him.

In the interview with Ms. Winfrey, Ms. Markle said she grew concerned about her son not having a royal title because it meant he wouldn’t be provided security. said digesting everything during while pregnant was “very hard.” More than the “prince” title, she was the most concerned about her son’s safety and protection.

Ms. Markle said it was hard for her to understand why there were concerns within the royal family about her son’s skin color. She said it was hard for her to “compartmentalize” those conversations.

Prince Harry, too, said there are lasting impacts about his wife’s treatment and his relationship with his family.

Their departure from royal duties began in March 2020 over what they described as the intrusions and racist attitudes of the British media toward the duchess.