The two were born 25 years apart with Eugenie arriving in 1990 and Charlotte coming into the world in 2015.
But what connects them is the fact they were both christened at St Mary Magdalene Church in Sandringham – the only current royals to be baptised there.
The stunning church on the Sandringham estate is where the royals usually enjoy their Christmas Day service.
In 1990 just days before Christmas, it was the setting for Eugenie’s christening, which was attended by family members including the Queen, Princess Diana and young princes William and Harry.
Eugenie was the first royal to be publicly christened, with the ceremony taking place after the regular Sunday service.
Fast forward to July 2015, and Charlotte was christened at the church – the same place where her late grandmother Princess Diana was baptised in 1961.
Well-wishers lined the path towards the church as Kate Middleton pushed Charlotte in a traditional Millson Prince pram that had been used by the Queen when Prince Andrew and Prince Edward were babies.
Love the royals? Sign up for the Mirror’s daily newsletter to get all the latest news on the Queen, Charles, Kate, Wills, Meghan, Harry and the rest of The Firm. Click here to sign up .
Her brothers George and Louis were both christened at the Chapel Royal at St James’ Palace in London.
In 2018, Charlotte was in Eugenie’s wedding party when she married Jack Brooksbank at St George’s Chapel in Windsor. The then three-year-old was a bridesmaid while older brother Prince George was a pageboy.
Meanwhile, it was recently claimed that Princess Eugenie had to cancel the christening of her baby son August due to a Covid scare.
The Queen, 95, was understood to have been among the guests due to attend the ceremony at the Royal Chapel of All Saints in Windsor.
But according to the Sun, a fellow attendee is said to have either tested positive for the virus or been pinged by the NHS Covid-19 app minutes before meaning the gathering had to be cancelled.