Earlier this year, our colleagues at genesreunited.co.uk (findmypast.com’s sibling site under parent company brightsolid) used marriage and birth records to predict William and Kate’s first child to arrive on  Aug. 27, 2013. While the palace has not announced a due date, the masses have connected clues to form a widely accepted due date of summer 2013 – pretty close to the calculation made in summer of 2012!

After analyzing birth and marriage records of the Royal family from the past 100 years, 851 days was calculated as the average period between a Royal wedding and the arrival of a Royal baby. Conception was therefore calculated to be in December 2012.

"There's certainly been a lot of speculation about when the arrival of a Royal baby might be; the bookies are even taking bets on names. William and Kate have spoken about their desire to start planning for a family, so make sure that you put the 27th August 2013 in your diaries, we have a good feeling about this one!" said Rhoda Breakell, head of genesreunited.co.uk on July 10, 2012.

A history of Royal births

The shortest period between a Royal wedding and a Royal baby followed the wedding of Her Royal Highness Princess Patricia of Connaught and Capt.  Alexander Ramsay on Feb. 27, 1919. The newly-wedded couple had their first child, Alexander, only 298 days later.

In contrast, the longest period of time followed Prince Henry's marriage to Lady Alice Montagu-Douglas-Scott on Nov. 6, 1935. They made the nation wait 2,235 days before the birth of their son William on Dec. 18, 1941.

Wedding dateRoyal coupleDays before birth of first child
12/21/1919Princess Patricia of Connaught and Capt. Alexander Ramsay298 days (Alexander)
2/28/1922Princess Mary and Viscount Lascelles345 days (George)
4/26/1923King George VI and Elizabeth Bowes Lyon1092 days (Elizabeth)
11/29/1934Prince George and Princess Marina of Greece and Denmark315 days (Edward)
11/6/1935Prince Henry and Lady Alice Montagu-Douglas-Scott2235 days (William)
11/20/1947Queen Elizabeth and Prince Philip361 days (Charles)
5/6/1960Princess Margaret and Anthony Armstrong-Jones547 days (David)
11/14/1973Princess Anne and Captain Mark Phillips1463 days (Peter)
7/29/1981Prince Charles and Princess Diana358 days (William)
7/23/1986Prince Andrew and Sarah Ferguson748 days (Beatrice)
6/19/1999Prince Edward and Sophie Rhys-Jones1604 days (Louise)
4/29/2011Prince William and Kate MiddletonPrediction of 851 days and baby name to be confirmed


Maybe we can predict a name as well?

As Royals in line to the throne, William and Kate's baby will need a name worthy of a King or Queen, but could Kate's 'commoner' background have influence? Analysis of the prevalence of previous royal family names, and those in Kate's family, reveal some possible options the young couple might be considering:

Girls namesBoys names

After findmypast.com’s previous research on famous family lines to the Queen, this child will also be related to Hilary Duff and a list of other celebrities.

Featured photo by Robbie Dale (Flickr: Will&Kate) [CC-BY-SA-2.0 (http://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons