Naming your first child is tough, because it’s a blank slate. Are you gunning for a unique baby name, or should you stick with the classic baby names? Was your SO serious when they suggested naming a boy after Great Uncle Herman? We’re taking a look at the best celebrity baby names for younger siblings of 2015 arrivals. They’re good names on their own, but when combined with their siblings, these make for some of the best high-profile sibsets of 2015.

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1. Charlotte and George: Her Royal Highness Princess Charlotte Elizabeth Diana of Cambridge arrived this May, complete with all the fanfare due to being the daughter of a future monarch. Her name hit exactly the right note: thoroughly royal, with a loving nod to William’s late mother. It’s the perfect sister name for George Alexander Louis.

2. Laila and Louis: Sandra Bullock’s daughter’s name is Laila. While Laila and Louis aren’t quite the same style, the shared first letter links the two names nicely. Sure, it’s possible to go overboard with matching initials. But in this case, it seems like a nice way to demonstrate family unity.

3. Holt and Harper: Actors Tiffani Thiessen and Patrick Smith stuck to the same first initial for their children’s names too. The couple went with rising favorite Harper for their daughter in 2010. This past summer, they added son Holt to their family. Not only do these names share a first letter, like Laila and Louis, but they’re also both surname names. No wonder Harper and Holt sound just like siblings.

4. Vivienne and Theodore: Ali Larter and husband Hayes MacArthur chose current classics for their two children: son Theodore and daughter Vivienne, born early in 2015. It’s a style that lets you have your cake and eat it too. Names like Josephine, Henry, Amelia and Charlie can be on-trend without being trendy. It’s also the kind of style that works for a large family.

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5. Rafael and Carmen: Alec Baldwin’s wife Hilaria was born in Spain, so their family is one of many looking for names that work nicely in Spanish as well as English. But instead of Isabella or Sofia, they chose the tailored, musical and unexpected Carmen for their daughter in 2013. In June of this year, they added son Rafael to their family. It’s another graceful crossover name that isn’t quite what you might have guessed.

6. Wolfe, Kenzo, Aoki and Ming: Model-turned-designer and reality television star Kimora Lee Simmons has four children with truly international names. Kimora’s heritage is Japanese, Korean and African-American, so it’s no surprise that she’s chosen names that reflect a global perspective. New son Wolfe, born in April, is her first with her new husband, banker Tim Leissner.

7. Montgomery, Elula and Olive: Isla Fisher and Sacha Baron Cohen welcomed their first child in 2007, daughter Olive. It proved to be an ahead-of-the-trend choice. Second daughter Elula’s name was even bolder. Now son Montgomery Moses Brian has joined the family, and his name could prove to be another rising choice.

8. Edith, Ignatius, Roman and Dashiell: Call it vintage eclectic. Cate Blanchett and husband Andrew Upton have four children, each with a name that’s old-fashioned, yet feels fresh and intriguing. While all four names have a certain antique charm, they’re all distinctive, surprising choices too.

What are your favorite celebrity sibsets? Tweet us @britandco and let us know!

(Photos via HRH The Duchess of Cambridge/Getty, @hilariabaldwin)