Catholic mom of seven. Favorites for next baby: Lucy and Thomas
Anna does seem a bit conservative next to Rosalie. I'd expect Rosalie's sister to be Annabel or something similar.
Elizabeth because it's a bit longer seems somewhat more matched to Rosalie than Anna but still a bit more conservative. Again a variation like Isabella might seem to have the Rosalie vibe.
Matilda is close to Matt but as a father-daughter pair as opposed to siblings I think it could be seen more as a sweet nod to dad.
I like Stella with Rosalie. They have several shared sounds but don't seem to similar.
I too like Audrey. It's the name of my 16 year old niece who was named for her grandmother. I have overheard a fair number of Audreys and Aubreys in swim lessons, playgrounds, classrooms over the years and I almost certainly noticed them more because of my niece but it certainly isn't ubiquitous. It does seem a bit more conservative (if that's the right word) than Silas and I wonder if that's where your hesitation lies. From your list I would have expected Silas's parents to pick Hazel for their daughter.
My 6 year old will be James T. in his class this year - there are 3 other boys named James. We do call my son Jay but he doesn't want to use it at school. My daughter is one of two Clare/Claire in her math class this year as well.
I have a 3 year old named Andrew. His brothers are Paul, Mark, James, and Gabriel. Thomas, John, Luke and Henry also come to mind as handsome options.
One thing to consider is if Egon is an outlier on your list of favorites would naming a subsequent child be a challenge for you. I'm definitely not saying sibling names have to coordinate but it's worth considering.
Violet is the one name on the list that jumps out at me as a name that suddenly seems to be on lots of my friends' lists. It also does seem pretty similar sound wise to Everett.
Fenton holds no appeal to me. I like Calvin (and Cal!) much better.
Had I known this fact in 2008 I would have named my daughter Catherine as we went with Katharine because I didn't care for the look of Cate and much prefered Kate even though her namesake (my mom) is Catherine.
Also wanted to add that we use Kat a lot and even Kitty some and she mostly uses her fullname (and even finally Kate at school and soccer) so there are a lot of nickname options other that Cathy.
When I read your post title I immediately thought of C/Katherine! Sort of crazy given all the names that could be described as classy and elegant. I love both the C and K spellings - my mom's name uses a C and we went with K for my daughter.
I'm familiar with it as I used it as my name in French class in high school. I like it and would love to meet a Laure.
Oooh, I was just thinking about Rosemary again this morning. Such a lovely name.
Nicholas is a great suggestion!
What lovely names your children have! My husband and I also have a large family and talk about names constantly despite having very traditional taste in names.
I think Chirstopher nicknamed Kit would work fine since you aren't actually naming him Kit. For me Kit isn't used enough for boys or girls to be strongly associated with either gender.
I do find Boaz to be too different from his siblings for my preference.
Other names that came to mind for you were Thomas, Henry, Timothy, Gregory and Samuel.
I was thinking the same thing. Both are fantastic names and generally I'd prefer Katherine but the flow is better with Molly because of the ending sounds. Of course if she uses Kate or one of the other short forms of Katherine then it will matter less. I also just realized that I know sisters Molly and Catherine.
Congratulations on your baby! Nicholas is such a handsome name. I agree with the previous poster that names can take a while to click with the baby and nicknames also can take a while to emerge. Sometimes "the baby" or various assorted nonesense names come more naturally in the early months. Some nicknames seem to fit older children better and sometimes nicknames that seemed unappealing initially end up clicking in the end. For example, my nearly 9 year old has cycled through several nicknames and currently answers to an embarrasing number of appelations where as no-nickname has clicked for my nearly 3 year old son.
I definitely felt weird when we tried to use the name Gabriel for our son before he was born. So much so that I decided I didn't like the name at and we started over. I finally decided that any name was going to feel odd to use on a person I hadn't yet seen. Even now Gabriel still feels like a lot of name amd we call him the baby or baby bear.
I was surprised not to see Leo or Eli on this list.
Wasn't sure if you wanted nicknames for Greer or names that lend themselves to the nickname Greer. If the later is the case, I'd recommend Gregory.
I second the vote for Jay!
Elizabeth and Charlotte are lovely names for sisters!