Name Help is a series at Appellation Mountain. Every week, we discuss reader’s name questions, usually on Tuesdays and Fridays. We’re relying on thoughtful comments from the community to help expectant parents narrow down their name decisions. Thank you in advance for sharing your insight! To have your question considered, email appmtn (at) gmail. Looking for your own private #namehelp post? Order one here.

THEY FOUND THE PERFECT NAME FOR THEIR FIRST DAUGHTER

Kaycie writes:

My husband and I agree on lots of things, but somehow names aren’t one of them! He has a very traditional, popular in every year, kind of name. I have this super trendy, very 1990s name. For our kids, I want names that are a little bit different, but not made up, and hopefully not too trendy.

I’d always wanted to name a daughter Margot, but when our daughter was born two years ago, it felt like that was The Name every one we knew was using. My husband liked Ava, but I just didn’t want a Top Ten name. I pivoted and found Cleo on a list of girl names ending with O. I like the way it actually was popular in the early 1900s, and I don’t mind that it’s a little more popular again now.

Her middle name is Elizabeth, because I did worry just a little that Cleo might be a little bit much, but so far everyone loves her name and it really fits her personality.

For a boy, I liked Caspian, Rhodes, or Raphael/Rafe.

But we’re having another girl, and I don’t know what goes with Cleo. My husband still likes Ava, but I feel like we hear it all the time. The only name I keep coming back to is Noemi, but my niece and nephew are Noah and Emma, so that’s another name we really can’t use.

Please read on for my response and leave your thoughtful suggestions in the comments.

baby girl wearing headband wrapped in blanket sleeping on shaggy rug; sister for Cleo
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NAMING A SISTER FOR CLEO

Abby replies:

Congratulations on your new daughter!

As it happens, I have a Clio – so this list was extra-fun for me to think through.

It sounds like we need to match Cleo’s energy in a few different ways:

  • A sister for Cleo has to share that unexpected feeling.
  • And yet, her name should be at least a little bit familiar – vintage, rather than freshly invented.
  • There’s a certain high energy to Cleo, partly because of that O ending. We need something that matches that vibrant, upbeat sound.

While that list sounds specific, we could still go lots of different directions. I’m guessing you’d probably prefer to stick with a nickname-proof name – but I don’t think that’s necessarily a rule.

Let’s look at some options.

WHAT GOES WITH CLEO?

AFTON

The name of a river in Scotland, a Robert Burns poem, and a name that’s been used in small numbers over the years, too, Afton is complete and distinctive.

DINAH

I think Dinah has the same vintage, surprising energy as Cleo. They’re sisters in 1919 … or in 2026.

GOLDIE

There’s a shimmer to Goldie that reminds me so strongly of Cleo. Both names were popular in the early 1900s, too, making them sound even more like sisters.

JOVIE

Strictly speaking, Jovie is a a newer name. But it comes from Jove, another name for Jupiter from Roman mythology. It means cheerful, from our word jovial. (That’s because we once believed that anyone born under the sign of Jupiter was destined to be happy.)

LUELLA

Vintage and sparky, Luella started out as a variant of any of the Lou- names. It sounds fresher than Isabella, more upbeat than classic Louise. This is the one name on the list that might shorten – to Lulu or Lula. Of course, Lula might also be a great sister for Cleo, too.

ROMY

Okay, it’s on the list partially because it’s always been my favorite name if I were naming my Clio’s sister. But Romy also has history. It’s a contracted form of Rosemary or Rosemarie. Midcentury European actress Romy Schneider makes this name every bit as glam as Ava.

VEDA

You might also spell it Vida, Vita, or Veta. This particular spelling tends to be associated with a Sanskrit word meaning knowledge, while Vita is from the Latin word for life. I think they all work, though, and Veda had a good run during the late 19th and early 20th centuries, making it a vintage sister for Cleo.

ZORA

On paper, it’s a Slavic name meaning dawn. In practice, it sounds a lot like current favorites Nora, Cora, and Aurora. Any Z name feels a little more interesting. I think Zora stands up nicely to Cleo’s cool, edgy sound, while still being different enough. While Zora ranks in the current US Top 1000, just like Cleo, it’s less common. And while Zora might be misheard as Zara (or Nora or Cora), I think it’s likely to wear every bit as well as Cleo.

I think my favorite for you is Zora, particularly balanced with another classic middle. Zora Katherine, maybe? I do also really like the sound of Dinah. Cleo Elizabeth and Dinah Louise, maybe?

Readers, over to you! What would you name a sister for Cleo Elizabeth?

About Abby Sandel

Whether you're naming a baby, or just all about names, you've come to the right place! Appellation Mountain is a haven for lovers of obscure gems and enduring classics alike.

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What do you think?

28 Comments

  1. Just a few more ideas:

    Cleo & Topaz (Cleo & Topaz are both Greek)
    Cleo & Ember (gets the “em” sound you might have with Emma)
    Cleo & Lyric (both Greek)
    Cleo & Lyra (Greek)
    Cleo & Xanthe (Greek)
    Cleo & Aura

    I will stop chiming in, but I definitely think you have lots of lovely options!

  2. We like a lot of the same names so I’ll just throw out a few. My second was going to be Cleo or Theo (ended up being Theo)

    Daphne
    Matilda
    Quinn
    Fiona

  3. My first thought was Jovie, I also love Romy and Vida. I know two girls named Vida, one has a sister named Cleo!

    Another idea was Davina. Like Ava, it has that sharp “v” in the middle, but Cleo and Davina have a similar sparkiness.

    Vivian is another name with a bright “v” and a feminine-but-not-frilly vibe. Vivian and Cleo sound like sisters to me!

    Zelda is another fun one. That zippy “z” adds so much personality, and Cleo and Zelda are adorable together.

    Juno might be too close to Cleo, but they give me such similar vibes: a vintage but not fusty, feminine but not frilly. Juno Noemi would be so cute!

    I also love Opal with Cleo. Pearl and Ruby are more common but Cleo and Opal both have a little bit of something unexpected!

    If you’re willing to go for something a little longer, Matilda feels like it falls between Margot and Cleo. Tilda, Tilly, and Mattie are sweet nicknames, but Cleo and Matilda in full sound like sisters.

    Esme reminds me of Noemi, it’s a little softer and more feminine. Cleo and Esme are perfect together!

    Overall, I really do love Vida with Cleo, and Romy as a close second. But I think that from my list, Esme and Davina are great! Davina Margot and Cleo Elizabeth is gorgeous. Good luck!

  4. Cleo Elizabeth is so cute.

    I love Romy and Veda (we also know a little Vada).

    I’ll throw in Cleo and Iris, Tess, Sybil, Zara, Eve, Nina, Demi, Nina, Alma, Ruby, Eden, Hope, Zelie, Gwen, Vera.

    Since you loved Margot, I might suggest Cleo and Mara, Maisie, or Margo.

    Since your husband loves Ava, I might suggest Cleo and Ada, Ayla, or Isla.

  5. I like your style. My second was also almost Margot or Cleo! I love that you chose Cleo. Hmm yes sister names are tougher if your partner is still liking Ava!

    Here are some ideas that I think pair nicely with Cleo and that I had on my larger list (mostly ones I wish I was daring enough to use!):

    Evadne
    Guinevere
    Novella
    Billie
    Penny
    Rooney
    Prairie
    Frankie
    Neely
    Fleur

    I like Abby’s suggestions of Veda and Jovie. There is something about that V that may find a bridge between your partner and you…

    I could see a sister Evadne Charlotte to invert big sister’s initials! But my very fave with big sister is Penny, I feel like she’s overlooked but packs the same energy and is familiar and sweet yet can age just fine.

  6. Also…since you liked Margot, what about these other short forms of Margaret:

    Cleo & Rita
    Cleo & Greta
    Cleo & Pearl (Margaret means “pearl”)

    And…a few other ideas:

    Cleo & Meryl
    Cleo & Willa
    Cleo & Geneva
    Cleo & Inès

  7. Cleo and Tessa
    Cleo and Beatrix nn Bea or Bex
    Cleo and Polly
    Cleo and Gemma
    Cleo and Mabel
    Cleo and Sabine
    Cleo and Opal (might be too many shared sounds?)
    Cleo and Esme
    Cleo and Fiona
    Cleo and Imogen
    Cleo and Rosaline

    There’s lots of different things you can lean into with Cleo! I think the high energy vintage would be my choice but honestly there are so many names that just fit with Cleo!

  8. I love Cleo, it’s such a fun name! I agree that Cleo’s sister needs a name with similar energy. I love the suggestions of Veda and Zora. I think Veda is especially good since it feels similar to your husband’s top choice of Ava.

    Other ideas:
    Cleo and Zelda
    Cleo and Zara
    Cleo and Adair
    Cleo and Ruby
    Cleo and Nadine
    Cleo and Louise
    Cleo and Indira
    Cleo and Fiona
    Cleo and Jade
    Cleo and Zadie
    Cleo and Vivica
    Cleo and Liv
    Cleo and Tessa
    Cleo and Felicity

  9. Zora is an excellent suggestion!

    Eve
    Inez
    Fern
    Irina
    Jill
    Niobe
    Anwen
    Selena
    Sunniva
    Thea
    Viola
    Zinnia
    Ziva
    Jewel

  10. Cleo & Alma
    Cleo & Nina
    Cleo & Lena
    Cleo & Audra
    Cleo & Vienna
    Cleo & Faye
    Cleo & Calla
    Cleo & Sasha/Sascha

    Best wishes!!