Sir Mick Jagger has apparently named his eighth baby Deveraux Octavian Basil. Photo / Instagram

Sir Mick Jagger appears to have named his newborn son Deveraux Octavian Basil Jagger.

A photograph of the baby, Jagger's eighth child, appeared on an Instagram account under the name of Elizabeth Jagger, one of the Rolling Stones rocker's other children.

The caption read: "My beautiful baby brother Deveraux Octavian Basil Jagger."

Basil was the first name of Jagger's late father, who died in 2006, although he was known to others as Joe.

Jagger became a father again at the age of 73 on December 8, with his partner Melanie Hamrick, 29, the Daily Mail reports.

Elizabeth, commonly referred to as Lizzy, is followed by more than 50,000 people on her social media account, although it is not verified.

Jagger, who is a great-grandfather, has six other children as well as Lizzy and his one week-old son - Karis, Jade, James, Georgia, Gabriel and Lucas - from previous relationships.

Their ages range from 17 to 46.

Jagger and Hamrick began dating after the death of fashion designer L'Wren Scott in 2014, Jagger's partner of 13 years.

A representative for Jagger has been contacted.

It is understood he flew 3,500 miles from London to New York in a last-minute dash to be by Hamrick's side for the birth.

A source told the Daily Mirror the legendary rocker said he "needed to be there" for his partner.

The source added: "He made sure he was there. He wouldn't have missed it for the world."

A statement released on behalf of the couple said: "Melanie Hamrick and Mick Jagger's son was born today in New York and they are both delighted.

"Mick was at the hospital for the arrival. Mother and baby are doing well and we request that the media respect their privacy at this time."

The news comes after it was revealed that the Rolling Stones are on course for this week's UK Number One album.

The rockers' latest LP 'Blue & Lonesome was way ahead in the midweek charts.

Jagger is understood to have given Hamrick a $150,000-a-year maintenance deal to help the ballerina raise their child.

He is also believed to be helping the New Yorker find a home in the US to raise the boy.

The $150k will be paid until the child is 18, with school fees also paid for. After secondary school a trust will help cover further education and expenses, which could be as much as £500k.

Even though the pair are not planning on getting married, they plan to co-parent given his hectic work schedule.

A source told MailOnline: "Mick wanted to make sure that the deals and money aspects were in place before Christmas and the birth of their child.

'Mick is adamant that the kid will be cared for and the deal works out at 150k a year and then housing on top of that.

​"​It is a very fair deal for family to make sure they have adequate care and finances, and of course Mick is keen to help raise the child. Mick insists that he will be stand by Melanie throughout the child's first 18 years.

"After that they will make sure that the child's future is provided for too whether it be a career or seeking further education. This is a very amicable deal which has been agreed between a couple, who are not married, but are devoted to doing the right thing for the child.

'"Mick is excited about the shows and has found a new found love for the band again.

"They will be pushing their new blues album out too during much of 2017. He is very excited about things that are happening with the band."

Jagger has a daughter, Karis Hunt Jagger, 46, from his relationship with Marsha Hunt and a daughter Jade Jagger, now 45, with his ex-wife Bianca.

He had four children with his ex-partner Jerry Hall - Elizabeth, 32, James, 31, Georgia, 24, and Gabriel, 18.

He also had a son, Lucas, 17, following a brief relationship with Brazilian model Luciana Gimenez.

Their liaison ended Jagger's 22-year-relationship with Hall, who is now married to media mogul Rupert Murdoch.

Jagger has five grandchildren and became a great-grandfather in May 2014 when Jade's daughter Assisi gave birth to a baby girl.

The new addition is his eighth child, and his first with Hamrick.

The baby news comes six months after his bandmate Ronnie Wood's wife Sally Humphreys gave birth to twin girls, just two days before Wood turned 69.

In an interview given by Wood a month after the birth of his daughters, Wood revealed that Jagger was one of the first people to meet them.

He told Hello! magazine: "Mick popped in on the third day. He couldn't wait to see them, I put one in each arm and took a photo."