Which middle do you prefer with [name]Briar[/name]? [name]Rose[/name] or [name]Leigh[/name]? Or another one altogether?
I like the sound of both, and am leaning slightly to [name]Leigh[/name] more.
They both sound great. But my choice is [name]Briar[/name] [name]Rose[/name]
Hmm, I’m not sure about either. [name]Briar[/name] is a thorny plant, as are rose plants. That’s a lot of thorns 
[name]Briar[/name] [name]Leigh[/name] makes me think of popular Briarly, which I don’t care for.
I would choose [name]Briar[/name] [name]Rose[/name]. However, [name]Rose[/name] is pretty overdone as a middle name. Have you thought about an alternative version of [name]Rose[/name]:
[name]Briar[/name] [name]Primrose[/name]
[name]Briar[/name] [name]Rosalie[/name]
[name]Briar[/name] [name]Rosalind[/name]
[name]Briar[/name] [name]Rosaline[/name]
[name]Briar[/name] [name]Rosamund[/name]
[name]Briar[/name] [name]Rosemary[/name]
Although, having said that, I think [name]Briar[/name] [name]Rose[/name] is lovely by itself! Or you could go for something a bit more traditional…
[name]Briar[/name] [name]Elizabeth[/name]
[name]Briar[/name] [name]Katherine[/name]
[name]Briar[/name] [name]Susannah[/name]
[name]Briar[/name] [name]Victoria[/name]
[name]Just[/name] some thoughts…Good luck!
[name]Briar[/name] [name]Rosalie[/name] is lovely! It also meets both the [name]Rose[/name] and [name]Leigh[/name] parts. 
I also like [name]Briar[/name] [name]Elizabeth[/name] ([name]Elisabeth[/name]) and [name]Briar[/name] [name]Victoria[/name]. Thank you.
I would go [name]Leigh[/name] but almost definitely spell it [name]Lee[/name]. I find the gh spelling a bit cluttered. And I have liked [name]Lee[/name] for a girl since I read the [name]Poe[/name] [name]Poem[/name] w/ [name]Annabel[/name] [name]Lee[/name].
[name]Briar[/name] [name]Rose[/name] is beautiful in a fairy tale way (Sleeping Beauty was [name]Briar[/name] [name]Rose[/name]) and I hear it as one plant - the sweetbriar, aka eglantine rose, aka rose briar, so not really any thornier than [name]Rose[/name] in general. Have I mentioned I’m a hardcore garden dork? lol.
But I feel like because of Sleeping Beauty [name]Rose[/name] is the expected middle to soften and romanticize [name]Briar[/name]. And [name]Rose[/name] feels somewhat “expected” in any case, as its used-and-abused as a middle name very popularly.
Not that I’m recommending naming a child [name]Briar[/name] [name]Eglantine[/name].
[name]Opal[/name] [name]Briar[/name] is on my own list. I like the image of the flowers as gems glimmering in a thorny setting. [name]Briar[/name] [name]Opal[/name] isn’t ideal due to the initials, though.
Other ideas
[name]Briar[/name] [name]Flora[/name]
[name]Briar[/name] [name]Jewel[/name]
[name]Briar[/name] [name]Niamh[/name] - the “ee” sound of [name]Lee[/name], which I like.
[name]Briar[/name] [name]Phoebe[/name] - though Phoebes being birds, it sounds almost like an avian species.
Lastly, I like the concept of a name that MEANS “rose” but isn’t literally rose. [name]Shoshana[/name], Rhoswen, [name]Roisin[/name]?
To me [name]Briar[/name] [name]Leigh[/name] sounds like one name - like Briarly - so I would definitely go with [name]Briar[/name] [name]Rose[/name]. Though I do love the [name]Briar[/name] [name]Rosalie[/name] suggestion if it suits!
I don’t like either. [name]Briar[/name] [name]Rose[/name] is too thorny and reminds me too much of Sleeping Beauty. [name]Briar[/name] [name]Leigh[/name], sounds like an overly trendy version of [name]Briar[/name] (Briarly)
I like:
[name]Briar[/name] [name]Lydia[/name]
[name]Briar[/name] [name]Jane[/name]
[name]Briar[/name] [name]Elise[/name]
[name]Briar[/name] [name]Margaret[/name]
[name]Briar[/name] [name]Lianna[/name]
[name]Briar[/name] [name]Eliana[/name]
I love Sleeping Beauty, so [name]Briar[/name] [name]Rose[/name] would be a great guilty pleasure name for me. I think I prefer the other ideas you’ve been given, such as [name]Briar[/name] [name]Rosalie[/name], if you’re using the second name in the middle as opposed to a double barreled first. [name]Briar[/name] is wonderful, by the way!
I wouldn’t use [name]Briar[/name] [name]Rose[/name], it’s like calling your child [name]Rose[/name] [name]Red[/name] or [name]Snow[/name] White. Miaren [name]Rose[/name] would be cute though.
I agree with @ottilie [name]Briar[/name] [name]Rose[/name] is a little too much Disney’s “Sleeping Beauty” for me. I do like [name]Briar[/name] [name]Rosalie[/name] as an alternative though.
[name]Briar[/name] [name]Leigh[/name] is too much like Briarly - which I dislike. Though if you like the sound I much prefer [name]Briar[/name] [name]Leigh[/name] or [name]Briar[/name] [name]Lee[/name] to Briarly.
Since [name]Briar[/name] [name]Rose[/name] was the name of Sleeping Beauty, I find it a bit tacky. I love the suggestion of [name]Briar[/name] [name]Rosalie[/name].
[name]Briar[/name] [name]Rose[/name] is Sleeping Beauty, so I think it would be like calling your child [name]Cinderella[/name]. It is just too fairytale princess.
[name]Briar[/name] [name]Rose[/name] as a double mn is a cute idea though.
[name]Briar[/name] [name]Leigh[/name] is cute. I just posted about spotting the name Brierley. It is a bit trendy sounding though.
[name]Briar[/name] [name]Rosalie[/name] was an excellent suggestion!
[name]Briar[/name] [name]Beatrice[/name], [name]Briar[/name] [name]Bellamy[/name], [name]Briar[/name] [name]Bellerose[/name] (or any B mn) would be cute, then she could be called [name]Bebe[/name]/[name]Bibi[/name].
DEFINITELY [name]Briar[/name] [name]Rose[/name]. [name]Briar[/name] is quite a unisex name so pair it up with a feminine middle name. I hate double barrel first names. But [name]Briar[/name] and [name]Rose[/name] are both flowers with thorns, so in school she might get called thorny without the t.
[name]Briar[/name] [name]Rose[/name] is the name of Sleeping Beauty I believe. So unless you don’t mind that DIRECT association, I would go with [name]Briar[/name] [name]Leigh[/name].
I agree with most other posts. [name]Briar[/name] [name]Rose[/name] makes me think of Sleeping Beauty. I love the suggestion of [name]Briar[/name] [name]Rosalie[/name]. Although they share the same sound in the middle with the “r”.
Ok maybe it’s my ballerina days getting ahold of me, but I think [name]Briar[/name] [name]Rose[/name] is cool. I think of Balanchine’s Sleeping Beauty, and the moment where [name]Aurora[/name] turns down suitor after suitor while executing a series of impossibly balanced turns on pointe. The role requires some serious bloody-toed ballerina prowess, so I think of it as a girl-power ballet. I think [name]Briar[/name] [name]Rose[/name] is both romantic and badass, and I think it could be fabulous on the right girl.
Neither. Not a fan at all.
Haha, that’s why I don’t like it! I remember my toes!!!
While I think [name]Briar[/name] [name]Rose[/name] is pretty, the Disney association is just too obvious. If that is intentional and wanted then go for it! Otherwise, I do like [name]Briar[/name] [name]Leigh[/name]. I see what other posters are saying about it sounding like Briarly, but I kind of like names that make you take pause and pronounce distinctly. As long as there is an effort from the beginning to pause between her first and middle name, I think it’s lovely. I like that it forces a person to not slur in order to pronounce it correctly.