After much murmuring and supposition over the last few months, it is now official that the third royal Cambridge baby is on the way. There are many potential royal baby names that Baby #3 could have, but a more important question to ask is: What do we know about the Duke and Duchess鈥檚 established naming style?

1. All six of the names they have used for their children have royal precedence. George and Charlotte, in particular, have a distinctly Georgian feel.

2. Both George and Charlotte were popular English names at the time of their births. George was #12 in England in 2012 and Charlotte was #23 in 2014, so odds are that the Cambridges will go for another 鈥渃urrent鈥 name. Mary is adorable and very royal, but an outlier at #249.

3. Some of the names they have used subtly honor family members. In George鈥檚 case, he shares a middle name (Louis) with his father. Charlotte shares her mother鈥檚 and maternal grandmother鈥檚 middle name (Elizabeth) 鈥 all three are 鈥淐. Elizabeth鈥 鈥 Charlotte is aunt Pippa鈥檚 middle name, and Diana (Charlotte鈥檚 other middle name), of course, speaks for itself.

4. Repeating names of extended family members is clearly not an issue. William has maternal first cousins named George, Alexander, and Louis and Charlotte Diana. That said, they have avoided names currently in use among the more immediate royal family (i.e., the Queen鈥檚 children and grandchildren), so Anne, Andrew, Edward, Beatrice, Eugenie, Louise, and James won鈥檛 likely be first-name choices.

Based on all this information, I鈥檝e compiled a list of baby names which I think best fit the criteria outlined above. There is a wider pool for girls than boys, as most of the official royal male names are all currently 鈥渋n use鈥 by the immediate royal circle. The most likely candidates fitting their style are below.

most likely GIRLS鈥 names

Kate Middleton and Princess Charlotte

1. Alice: This is the bookies鈥 favorite already, and it鈥檚 a great bet. Alice is a thoroughly royal name, and the princesses who have borne it have been highly admirable. Queen Victoria鈥檚 daughter championed women鈥檚 causes and nursing and even managed field hospitals herself during the Austro-Prussian. Her granddaughter, Princess Alice of Battenberg, also devoted herself to charity, organized shelters for orphans and worked in soup kitchens, and sheltered Jewish refugees during WWII. This Princess Alice is Prince Philip鈥檚 mother, and therefore William鈥檚 great-grandmother. Alice is currently at #24, sitting right next to Charlotte in the ranks.

2. Amelia/Emily: Amelia and Emily are currently at #1 and #3 in England, so they certainly qualify as currently popular. Both names also get both the 鈥渞oyal鈥 and 鈥淕eorgian鈥 stamp from Princess Amelia (1711-1786), daughter of George II, and Princess Amelia (1783-1810), daughter of George III, who were both called Emily familiarly. Both Amelia and Emily sit really nicely stylistically alongside George and Charlotte.

3. Sophia: Another name which ticks the boxes of being popular, royal and Georgian. Britain nearly had our own 鈥淨ueen Sophia I.鈥 Sadly, the heir to the throne, Electress Sophia of Hanover, died weeks before she would have become queen in 1714, making way for her son George I. Princesses with the first or middle name Sophia followed soon after her. Sophia currently ranks at #12.

4. Eleanor: Eleanor was the royal name extraordinaire back in the Middle Ages, borne by three Queens of England and numerous royal princesses. It also retains a Georgian flavor, as the name was popularly used in the 18th century 鈥 Princess Amelia (1711-1786) was fully Amelia Sophia Eleanor. The name is #52 in England at the moment and is showing early signs of being on the rise again.

5. Matilda: Like Eleanor, Matilda was a medieval royal powerhouse. We even (briefly) had our very own ruling Queen Matilda for a while. While it hasn鈥檛 been used as a royal first name since the Middle Ages, it has been used as a royal middle name 鈥 and a Georgian royal middle name at that 鈥 such as for Princess Caroline Matilda (1751-1775) and Princess Sophia Matilda (1777-1848). Matilda is currently #27 in England, very close to Charlotte.

6. Isabella: With three medieval Queens of England and several princesses with the name, Isabella has perfect royal credentials. The down side is that it has not been used as a royal name since the 15th century, but at #8, it ticks the box of being popular, royal and traditional.

most likely BOYS鈥 names

1. Arthur: Arthur is the bookies鈥 favorite for a boy already and, as with Alice, it鈥檚 not hard to see why. If we discount the names currently used by the royal family (Charles, Henry, Edward, William, James, etc.), then Arthur is the highest ranking of all the royal names left over, at #35 in England and rising. Not only is it famous for the legendary King Arthur, but we almost had an actual 鈥淜ing Arthur鈥 when Henry VII gave it to his eldest son. Sadly, we were deprived when he died aged 15. Queen Victoria later reintroduced the name to British royalty when she gave it to one of her sons.

2. Frederick: A Georgian royal name which is another kingly name we never had. Frederick Louis, Prince of Wales, was the eldest son and heir of King George II. When he predeceased his father, his son, George III, became king instead. Frederick was also used by several other princes and was the second name of both King George V and King George VI. Frederick currently ranks at #75 in England, but with Freddie at #17, it feels even more current.

3. Albert: We have Queen Victoria to thank for making Albert a royal British choice. Devoted to her husband, Prince Albert, she was determined that all her 鈥渕ale English descendants鈥 would have the name. She determinedly gave the name to all her sons (first or middle) and pestered all her children to use it as well (most of them complied). She even went as far as to decree that the Prince of Wales鈥檚 first son be called Albert Victor even before informing his parents. The last royal to bear Albert as a first name was the Queen鈥檚 father, King George VI, but it is also one of Prince Harry鈥檚 and Prince Andrew鈥檚 middle names. Albert is a fashion-forward choice at the moment 鈥 currently #69 in England and on a steep upward curve.

Outliers

1. Victoria: Victoria is second of the bookies鈥 favorites for a girl at the moment, but for me, it is a bit of an outlier. Yes, it鈥檚 royal 鈥 borne by a ruling queen 鈥 but as royal names go, it鈥檚 a relatively modern one and, unlike Charlotte and George, which were popular names in the 18th and 19th century, Victoria was always rare. Even during Queen Victoria鈥檚 reign, it was pretty uncommon (usually around #140-170). Having made it into England鈥檚 Top 100 in the 1970s, Victoria peaked at #7 in 1984 and declined from that point until it reached #105 in 2006. Since then it has gained a little ground at #88, but has certainly plateaued.

2. Alexandra: Another of the bookies鈥 favorites, Alexandra is royal but was only introduced to British royalty when Alexandra of Denmark married Prince Albert Edward (later Edward VII) in 1861. It ranks at #116 and is declining. Given that George has the middle name Alexander, I don鈥檛 see them using the feminine form.

3. Grace: The bookies have Grace as their fifth girls鈥 name option at 16/1 odds. Here鈥檚 the thing: Grace isn鈥檛 a British royal name, which feels like that would rule it out straight away. Thanks to Grace Kelly (AKA Princess Grace of Monaco) it does have a royal slant for many, however. If we ignore the fact that Grace doesn鈥檛 have credentials in British royalty, it does tick the boxes of being currently popular (at #14), and it was a popular favorite in the Georgian era. George, Charlotte, and Grace 鈥 stylistically and historically 鈥 do work nicely together.

4. Henry: Like Grace, Henry is fifth on the bookies鈥 list for a boy, with 16/1 odds. It is perfectly royal, classic, and, at #13, currently popular. The only problem is that it breaks the rule of being currently used by the immediate royal family as William鈥檚 brother鈥檚 name. As he goes exclusively by Harry, however, a Prince Henry wouldn鈥檛 cause much confusion for the rest of us, but I feel it may be a little too close for the Cambridges.

5. Alfred: Alfred the Great was (as his name implies) a notable Anglo-Saxon king. Since then, the name has been also borne by a son of George III, and a son and grandson of Queen Victoria. It ticks the boxes of royal credentials and not being currently 鈥渘abbed鈥 by royalty. It ranks at #114 at the moment, however, which feels quite removed from Top 30 favorites George and Charlotte. That said, Alfred is rising and Alfie, at #14, does make Alfred look more modern.

Middle name fodder:

1. Caroline: Two Georgian queens and three princesses bore the name Caroline. Popularity wise 鈥 at #674 鈥 it feels a little out of step with George and Charlotte, but it would be a perfect royal choice to honor Catherine鈥檚 mother Carol. If they want to continue the 鈥淐. E鈥 tradition for girls, Caroline Emily is a possibility.

2. Mary: Very sweet, very royal, Mary doesn鈥檛 feel 鈥渃urrent鈥 enough (at #249) for their taste as a first name, but there is no reason that it won鈥檛 make the middle name cut, especially given that the Queen has it as a middle name.

3. Frances/Francis: Princess Diana鈥檚 middle name was Frances, and Catherine鈥檚 father鈥檚 middle name is Francis. Boy or girl, Francis/Frances makes a great middle name option to honor both grandparents.

4. James: A perfectly kingly name, James feels a little too close to use as a first name (but never say never!). It鈥檚 not only the name of Catherine鈥檚 brother but also Prince Edward鈥檚 son. Who knows, perhaps they will opt for both Henry and James as middle names to honor both paternal and maternal uncle in one fell swoop.

5. Michael/Philip: Either maternal grandfather or paternal great grandfather could possibly get an honor middle name.

What鈥檚 your pick for the next royal baby鈥檚 name? Let us know @BritandCo!

This post was previously published on Nameberry by Eleanor Nickerson.

(Photos via Pool + Chris Jackson + WPA Pool/Getty)