Would love thoughts on our list… and let us know if theres any names you think we missed!
[name]Laura[/name]
[name]Flora[/name]- not sure with the margarine brand.
[name]Polly[/name]- maybe as a nickname for [name]Mary[/name]?
[name]Mary[/name]
[name]Rose[/name]
[name]Sarah[/name]
[name]Sadie[/name]- nickname for [name]Sarah[/name] or stand alone?
[name]Sara[/name]
[name]Kayla[/name]
[name]Grace[/name]
[name]Tess[/name]
[name]Iris[/name]
[name]Laura[/name]: A safe and sweet choice. I like it.
[name]Flora[/name]: Prefer it to [name]Laura[/name]. But the margerine could make for some teasing issues 
[name]Polly[/name]: Really sweet! Not sure how well it woud age.
[name]Mary[/name]: I love [name]Mary[/name]!
[name]Rose[/name]: [name]Love[/name] this too, not a big fan of nn [name]Rosie[/name] though.
[name]Sarah[/name]: [name]Love[/name] with nn [name]Sadie[/name].
[name]Sadie[/name]: Prefer [name]Sarah[/name] nn [name]Sadie[/name].
[name]Sara[/name]: Cute, but I prefer [name]Sarah[/name].
[name]Kayla[/name]: A little trendy but still sweet.
[name]Grace[/name]: [name]Love[/name], but its quite popular.
[name]Tess[/name]: Gorgeous
[name]Iris[/name]: Like it.
My favourites from your list are [name]Mary[/name], [name]Grace[/name] and [name]Tess[/name]. But all your picks are great!
All your picks are wonderful! My favorite with [name]Peter[/name] is [name]Sarah[/name]. Followed by [name]Mary[/name].
[name]Sarah[/name] [name]Grace[/name] or [name]Mary[/name] [name]Grace[/name] would be beautiful!!
From your list, [name]Sarah[/name], [name]Rose[/name], [name]Laura[/name], [name]Grace[/name], [name]Mary[/name] and [name]Iris[/name] would go well with [name]Peter[/name]. Here are some other suggestions for [name]Peter[/name]'s sibling. Good luck, [name]Mischa[/name].
[name]Meredith[/name]
[name]Bridget[/name]
[name]Charlotte[/name]
[name]Phoebe[/name]
[name]Eliza[/name]
[name]Caroline[/name]
[name]Cora[/name]
[name]Evelyn[/name]
[name]Georgia[/name]
[name]Mae[/name] / [name]Maeve[/name] / [name]May[/name]
[name]Alice[/name]
[name]Catherine[/name]
[name]Lucy[/name]
[name]Helen[/name]
[name]Camille[/name]
[name]Jane[/name]
[name]Simone[/name]
[name]Ingrid[/name]
[name]Anna[/name] / [name]Hannah[/name] / [name]Anne[/name]
[name]Greta[/name]
[name]Margot[/name]
[name]Clara[/name] / [name]Claire[/name]
[name]June[/name]
[name]Ivy[/name]
[name]Audrey[/name]
[name]Celeste[/name]
[name]Laura[/name] - this is my name and I love it 
It’s classic but more down to earth than classics like [name]Elizabeth[/name] and [name]Margaret[/name]. [name]Laura[/name] and [name]Peter[/name] seem like obvious siblings to me and fit well.
[name]Flora[/name] - I used to get called [name]Laura[/name] [name]Flora[/name] as a child in school and hated it so I have negative associations with this name, and of course the margarine! [name]How[/name] about [name]Florence[/name]?
[name]Polly[/name] - Very cute though I’ve never understood it as a nn to [name]Mary[/name], and in fact I prefer [name]Molly[/name]. I like it as a nn for [name]Penelope[/name] or [name]Paulina[/name] though, but [name]Polly[/name] and [name]Peter[/name] might tie you in to a P name trend.
[name]Mary[/name] - I love [name]Mary[/name], it’s such a sweet name and doesn’t get much credit these days.
[name]Rose[/name] - Beautiful, simple, refined. Definitely a great name and I love the nn [name]Rosie[/name].
[name]Sarah[/name] - seems a little overdone in my generation (twenties) so I’m bored of it but it is a lovely name. Reminds me of the book A [name]Little[/name] [name]Princess[/name]
[name]Sadie[/name] - this definitely spices up [name]Sarah[/name] a bit and makes it fresher so if you were to use [name]Sarah[/name] I think [name]Sadie[/name] as a nn would be great. Although there is a [name]Sadie[/name] in my family who is just [name]Sadie[/name] so that seems normal to me too. Maybe not as formal as [name]Peter[/name] though.
[name]Sara[/name] - I prefer [name]Sarah[/name].
[name]Kayla[/name] - This seems totally out of step with all your other names and especially with [name]Peter[/name]. Guilty pleasure? Lol. I don’t generally like many K names, I hate the nn [name]Kay[/name] which it would inevitably get shortened too and it seems very trendy and already seems quite dated.
[name]Grace[/name] - Gorgeous name, too popular here in the UK but if you’re in the US I think it’s very sweet.
[name]Tess[/name] - a personal favourite, this is on my own list and although it’s technically a nickname, I like it with [name]Peter[/name].
[name]Iris[/name] - gorgeous, soft botanical name. [name]Peter[/name] and [name]Iris[/name] are lovely together and I love the meaning and sound of this name.
OK so I like a lot of your names, but my favs in order are:
[name]Peter[/name] and [name]Mary[/name]
[name]Peter[/name] and [name]Rose[/name]
[name]Peter[/name] and [name]Iris[/name]
[name]Peter[/name] and [name]Grace[/name]
[name]Peter[/name] and [name]Tess[/name]
[name]Peter[/name] and [name]Laura[/name]
[name]Peter[/name] and [name]Sarah[/name]
Any of these would work very well. [name]Flora[/name] and [name]Iris[/name] are the most interesting to me, although [name]Sarah[/name], [name]Rose[/name], and [name]Mary[/name] are all very sweet.
[name]Flora[/name]
[name]Mary[/name]
[name]Rose[/name]
[name]Sarah[/name]
[name]Iris[/name]
[name]Just[/name] some thoughts.
[name]Laura[/name] - Beautifully simple, without being plain. Would work well with [name]Peter[/name], I think.
[name]Flora[/name] - A bit too flowery for my taste, but still pretty!
[name]Polly[/name] - Unless you’re looking to continue with the ‘P’ names after this, I’d avoid it.
[name]Mary[/name] - I’m Irish, so this one conjures up a very Catholic image for me. Can’t say I love it.
[name]Rose[/name] - Classic. Works well with [name]Peter[/name], as they both have a very soft/gentle sound.
[name]Sarah[/name] - Again, a classic. I love [name]Sarah[/name].
[name]Sadie[/name] - Sweet and pretty, but seems like a nickname for [name]Sarah[/name] to me.
[name]Sara[/name] - I prefer the “[name]Sarah[/name]” spelling, but each to their own. It’s the same name, either way.
[name]Kayla[/name] - Although I like this name a lot, I don’t think it sounds like the sister of [name]Peter[/name].
[name]Grace[/name] - If you’re not overly concerned with its popularity, this one is a beautiful contender.
[name]Tess[/name] - Unusual, with a feminine yet buttoned-up edge. I like it.
[name]Iris[/name] - I can’t say I’m crazy about this one, but I do like the soft sound it produces.
My favourites are:
[name]Peter[/name] and [name]Laura[/name]
[name]Peter[/name] and [name]Rose[/name]
[name]Peter[/name] and [name]Sarah[/name]
We have our own dear [name]Peter[/name]! My favorite girl names, should we ever have a girl are [name]Cecilia[/name]/[name]Cecily[/name], [name]Susanna[/name] and [name]Louisa[/name]
I adore many of the short and simple names from your list and especially [name]LOVE[/name] [name]Mary[/name]! [name]Laura[/name] and [name]Sarah[/name] (nn [name]Sadie[/name]) seem like perfect matches as well)!!