Your daughters have lovely names!
[name]Charlotte[/name] - this is a pretty choice, and the nn [name]Lottie[/name] is beyond adorable. However, when I say it with your other daughters’ names, there are a lot of Os and Ls, which may or may not bother you. If it does, this would be beautiful in second place.
[name]Adelaide[/name] - beautiful, and it fits with your daughters’ names perfectly. Would it bother you that she and [name]Anne[/name] would share an initial? I don’t think it’s a problem as such, and if this is your favourite you shouldn’t let it stop you, but as you have such a long list of lovely names, it could be a way of narrowing it down.
[name]Mary[/name] - I don’t think this is too plain now at all; it’s undeniably a classic, but unexpected, and a pleasant surprise, on children now, just like [name]Anne[/name].
[name]Joanna[/name] - not if you already have an [name]Anne[/name]! You might like [name]Josephine[/name], as an alternative.
[name]Catherine[/name] - a complete classic, with the great nn options of [name]Cate[/name] and, as a wildcard, [name]Cricket[/name]. I also like [name]Katherine[/name] nn [name]Kitty[/name].
[name]Jane[/name] - another complete classic, which goes nicely with your other children’s names. Does it contain too many of the same letters as [name]Anne[/name]?
[name]Frances[/name] - nice, but it doesn’t leap out at me from your choices.
[name]Sophia[/name] - beautiful, but extremely popular, so if that bothers you, I’d relegate it to second place.
[name]Emma[/name] - ditto.
[name]Mathilde[/name] - absolutely beautiful, and the nicknames [name]Tilly[/name] and [name]Tilda[/name] are so lovely. [name]Anne[/name] would be the only one without an L in her name, but now I’m just being picky.
[name]Giselle[/name] - I adore this one (so glamorous), but as it has the same end sound as [name]Isobel[/name], I’ll have to suggest that it is kept to the middle.
[name]Adele[/name] - ditto.
[name]Cecile[/name] - the L ending issue isn’t as big with this one, and I think it so pretty. You might also like [name]Cecelia[/name], [name]Celia[/name], [name]Cecily[/name] and [name]Lelia[/name].
[name]Marguerite[/name] - very pretty. You might also like [name]Margot[/name].
[name]Odette[/name] - I abolutely adore this one, beyond belief, but as it is similar in sound to [name]Olive[/name] (two syllable O names ending in consonant sounds), I’m going to have to say it might be better in the middle. You may also like [name]Cosette[/name].
[name]Yolande[/name] - lovely, but as it contains the [name]OL[/name] of [name]Olive[/name] fairly prominently, and seems less congruent with your daughters’ names than some of your other choices, I personally wouldn’t choose it.
[name]Madeleine[/name] - this has a nice sound, but unfortunately it has been ruined slightly for me by the popularity of [name]Madison[/name], and also by all the misspellings which are popular at the moment, so I personally wouldn’t use it in first place.
[name]Christine[/name] - not as beautiful as some of your other options, in my opinion.
[name]Helene[/name] - nice, but I worry about mispronunciation (ignore me if you are in a French-speaking country); might Americans (I’m guessing you’re not in [name]Britain[/name] from your husband’s fascination with royalty) pronounce it Hel-een?
[name]Beatrice[/name] - absolute perfection, both on its own and with your daughters’ names.
[name]Josephine[/name] - oh, I suggested this earlier! I like it and its myriad nickname options, my favourites being Seffy, [name]Effy[/name] and [name]Posey[/name]. Does it bother you that it has the same last two letters as [name]Anne[/name]?
[name]Ingrid[/name] - intriguing, and sounds very nice with your daughters’ names.
[name]Augusta[/name] - in my opinion, this isn’t quite as pretty as some of your other options.
[name]Arabella[/name] - pretty, but has a very similar ending to [name]Isobel[/name], so for this reason I wouldn’t use it in first place.
[name]Amelia[/name] - if popularity bothers you, I wouldn’t use this one in first place.
[name]Alice[/name] - a lovely, vintage choice. It is in the top 50 here in [name]England[/name], but judging from comments on Nameberry it is much more unexpected in other countries, and I think it sounds very nice with your daughters’ names. She would share an initial with [name]Anne[/name], though, if that bothers you.
[name]Francesca[/name] - nice, and also goes well with your other daughters’ names.
[name]Isobel[/name] [name]Georgiana[/name] [name]Eleanor[/name]
[name]Anne[/name] [name]Elisabeth[/name] [name]Caroline[/name]
[name]Olive[/name] [name]Mirabelle[/name] [name]Victoria[/name]
And ”
[name]Beatrice[/name] [name]Jane[/name] [name]Odette[/name] - [name]Isobel[/name], [name]Anne[/name], [name]Olive[/name] and [name]Beatrice[/name]
[name]Mathilde[/name] [name]Sophia[/name] [name]Catherine[/name] - [name]Isobel[/name], [name]Anne[/name], [name]Olive[/name] and [name]Mathilde[/name]
[name]Alice[/name] [name]Francesca[/name] [name]Odette[/name] or [name]Alice[/name] [name]Francesca[/name] [name]Giselle[/name] - [name]Isobel[/name], [name]Anne[/name], [name]Olive[/name] and [name]Alice[/name] (on second thoughts, [name]Olive[/name] and [name]Alice[/name] sound quite similar ”)
[name]Mary[/name] [name]Adelaide[/name] [name]Cecile[/name] - [name]Isobel[/name], [name]Anne[/name], [name]Olive[/name] and [name]Mary[/name]
[name]Catherine[/name] [name]Amelia[/name] [name]Giselle[/name] - [name]Isobel[/name], [name]Anne[/name], [name]Olive[/name] and [name]Catherine[/name]
[name]Cecile[/name] [name]Madeleine[/name] [name]Odette[/name] - [name]Isobel[/name], [name]Anne[/name], [name]Olive[/name] and [name]Cecile[/name]
[name]Marguerite[/name] [name]Alice[/name] [name]Yolande[/name] - [name]Isobel[/name], [name]Anne[/name], [name]Olive[/name] and [name]Marguerite[/name] (her initials would first and middle initials would spell [name]MAY[/name], which I think is really sweet, too)
[name]Josephine[/name] [name]Alice[/name] [name]Odette[/name] - [name]Isobel[/name], [name]Anne[/name], [name]Olive[/name] and [name]Josephine[/name]
[name]Ingrid[/name] [name]Alice[/name] [name]Madeleine[/name] or [name]Ingrid[/name] [name]Arabella[/name] [name]Helene[/name] - [name]Isobel[/name], [name]Anne[/name], [name]Olive[/name] and [name]Ingrid[/name] (she would share an initial with [name]Ingrid[/name], though ”)
[name]Francesca[/name] [name]Charlotte[/name] [name]Adele[/name] - [name]Isobel[/name], [name]Anne[/name], [name]Olive[/name] and [name]Francesca[/name].
Good luck! [name]Auburn[/name]