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We often get comments on our "British-sounding" set, Juliet and Pippa. Pippa was almost Eleanora, so we have similar taste. Most of the other names we considered have been listed above: Imogen, Verity, Clara, Emeline, Josephine.
Karyn, Uther Pendragon is King Arthur's father in the BBC series, Merlin. I have no idea if that's true to legend or invented for the show, but at least your feeling was spot-on.
There's a little girl who attends our library storytime named Eowyn, called Wynnie. Just in case you're willing to go the fantasy route ;)
Congratulations on the twins! Here's my list, and I'll include my own kids in there :)
Girl: Juliet, Pippa, Eleanora, Verity, Coraline
Boy: Walter, Theodore, Arthur, Simon, August
Posts like this force me to confront my own age, because I'm momentarily shocked to see that 25 years ago was in the 90s. And all of the moms I know with these names are younger than I am.
TAL would be like the beginning of talent, or talisman. TALL would be the opposite of short.
I really notice when people make my daughter's name shorter too. We clearly say Joo-lee-eht, but my FIL says Jool-yet, and it drives me insane. He recorded one of those electronic books for her, the ones that read to her in his voice. I cringe everytime she opens it, because it begins, "To Jool-yet..."
In my experience, double-consonants tend to throw people off, regardless of standard spelling. I'm a Melissa, which has only one standard spelling, and I still often have to explain that the S is doubled, not the L. So I'd just go with the spelling you love and be ready to clarify. I slightly prefer Elliott over Elliot.
I guessed E, based on anectodal evidence. I have yet to meet an Olivia or Oliver, but our social circle is overflowing with kids named Evelyn and Emery.
I sure hope those baby girls named Uranus got great middle names.
I have wondered how reliable the name clouds are as far as representing real-life sibsets, not imaginary. Do you really think there are real sibsets of Romeo and Juliet out there?
I had them all correct at first, then switched Edgar and Ophelia last minute to the wrong places. I didn't realize Edgar was such a hit in Hispanic culture.
I don't think Cambrian would stick out at all in today's naming landscape, by the way. To show my utter lack of scientific knowledge, though, my first association when I read it was the Cambria font.
When we were discussing boy names, I was lobbying hard for Theo, but my husband strongly disliked Theodore. I jokingly suggested Théoden (from Lord of the Rings), nicknamed Theo, and he actually loved the idea. We never had a boy so it didn't become an issue, but I don't think I could have ever commited to it.
EVie, I did a quick scan of the names and only spotted 3 NT names: Aquila, Matthias, and Prisca (a diminutive of Priscilla).
Personally the most surprising on the list, despite many others being more obsure and difficult to pronounce/spell, is Goliath. Not only was he a villian, which I realize hasn't slowed names like Jezebel, but the physical characteristic association is way too prominent. The name has become an adjective...in fact, my oldest daughter sometimes refers to our youngest as Goliath Baby because she measures high on the charts.
Bella Luna means beautiful moon in Italian, and that could work as a double-barreled name.
For her first few years, my husband and I and a few close friends called her Jubie (rhymes with Ruby). I can't explain where it came from but it just FELT like her name. She went by Juju pretty much everywhere else. Within the last year, she has rebelled against nicknames, so we've had to adjust to the full Juliet. We are very much a nickname family so it's been a challenge!
My youngest is Pippa (the more traditional nickname for Phillipa). Since you have some -ette names in your list, you might like my oldest’s name, Juliet(te). I think Poppy and Jewel would be a great pairing.
Eleanora was a top contender for both of our pregnancies, and it looks like we have some overlap in taste. We ended up with Juliet and Pippa. Other favorites were Verity, Coraline, Imogen, and Clara. Arthur was on our boy list, along with Theodore, Simon, Walter, and August.
My main association is Diana Barry, Anne Shirley's beautiful and loyal best friend in Anne of Green Gables. It's classic and beautiful, so I don't think you can go wrong.