Please give me some opinions on these names!

Juniper is my favourite girl's name ever and will be the name of my hypothetical DD. It's awesome.

Ari - as Ari or Arry, I like
Sebastian - yes ('Bastien, SAY MY NAME!')
Inigo - maybe
Crispin - no
Levi - LOVE
Peregrine - NO WAY
Dexter (the next big thing?) - I like, was dd's boys name...
Julius- no

Lois - no
Ivy - maybe
Tabitha - maybe
Juno - yes
Octavia - no
Ione - yes
Claudia - yes
Juniper - yes, lovely
Zara - nice
Isis - very nice
Millicent - no

Am hippy, trying-to-be-boho, North/East London mum if that gives you a context

Sorry persephone I've just read that you live in Sydney, so I can see how the pronounciation would work there. Unfortunately here in Ziderr Coun'rree the poor boy would be Arreee

Ari - whoever said "cockney Harry" had it right!
Sebastian - yes
Inigo - ok
Crispin - no
Levi - hmm not sure. could be a grower
Peregrine - dear god no
Dexter (the next big thing?) - NO
Julius - a bit tth for me. How about Julian?

Lois - love it
Ivy - ok
Tabitha - cat
Juno - no
Octavia - hmm possible grower
Ione - no
Claudia - quite like this
Juniper - no
Zara - like this
Isis - not too sure
Millicent - no

Crispin & Juniper & Juno I don't really like - sorry...

Inigo ? there are probably a lot nicer names out there... but just my personal preference...

The others are all quite nice. Sebastian, Tabitha, Lois & Millie are all good.

Peregrine would take a bit of getting used to...but quite like Perry as a NN, so could be a name that "grows" on you

Ari - not for me
Sebastian - OK but I wouldn't use it but can see why others might
Inigo - awful
Crispin - NO!
Levi - not for me, are you Jewish?
Peregrine - could live with Perry
Dexter (the next big thing?)- no
Julius - prefer Julian

Lois - love
Ivy - no
Tabitha - makes me think of the witch
Juno - no
Octavia - only if eighth child but like
Ione - ???
Claudia - depends how you say it
Juniper - not at all
Zara - prefer Sara
Isis - no
Millicent - not sure

Ari -- very nice
Sebastian -- too fancy and don't like Seb
Inigo -- like
Crispin -- only in certain circles
Levi -- nice
Peregrine -- nicer than Crispin, old fashioned in a very nice way
Dexter -- Dexy's Midnight Runners
Julius -- love

Lois -- dislike, too plain
Ivy -- like
Tabitha -- love
Juno -- love
Octavia -- a bit too much
Ione -- like
Claudia -- sounds harsh to me
Juniper -- dislike
Zara -- love
Isis -- like a lot
Millicent -- like

Sebastian
Inigo
Levi

Octavia
Ione

I really like this ones. What about Ianthe as well?

would be very careful with Juno, is quite it-y atm.

Ari - yuck
Sebastian - like
Inigo - hate - reminds me of indigo but missing the d
Crispin - not keen
Levi - jeans
Peregrine - falcon
Dexter (the next big thing?) - reminds me of Dex Dexter from Dynasty
Julius - ok, not great

Lois - can't get away from Lois Lane
Ivy - is ok
Tabitha - ok
Juno - hate it
Octavia - only for an 8th child, and our car is a Skoda Octavia
Ione - not bad
Claudia - ok
Juniper - is a type of tree
Zara - too royal
Isis - is a river
Millicent - not keen

Here are my first impressions...

Ari - unsure of
Sebastian - really like
Inigo - no
Crispin - like
Levi - sounds like a girls name to me? (probably wrong!)
Peregrine - no
Dexter (the next big thing?) - like
Julius - like

Lois - no
Ivy - ok
Tabitha - really like
Juno - no
Octavia - no
Ione - no
Claudia - really love
Juniper - no
Zara - really like
Isis - interesting name... unsure
Millicent - no

Ari- wonderful, singer Nico's son. Also name of character in Royal Tenenbaums. Personally I don't like short names that sound like nns but apart from this is fab.

Levi- fabulous, one of my top choices

Sebastian- like, quite normal now actually.

Crispin & peregrine- are quite hilarious. no. imho.

Inigo, Dexter, Julius- meh.

Octavia- my name. Please do not use if you are not actually very very posh as people assume you are. also not very easy to go do a job like carpentry or something similar if thats what your dc so desires. prescriptive & aspirational depending on if you're landed gentry or not.

Ivy, Tabitha, Juniper, Zara- love.

Claudia- Schiffer.

Isis, Ione- hard to pronounce

Millicent- smells like wee. bit prissy on the tongue. also i know a little milly who hates her name.

Juno- film. teen preg.

Lois- american housewife.

I like Ari, Sebastian, Inigo, Dexter, Tabitha and Ione best.

Do you live in NW London by any chance?

Ari no
Sebastian Love it
Inigo no
Crispin no
Levi no
Peregrine no
Dexter (the next big thing?) ok
Julius ok

Lois ok
Ivy no
Tabitha realy sweet
Juno no
Octavia no
Ione ok
Claudia ok
Juniper no
Zara like
Isis no
Millicent no

Oh I missed Peregrine! Tbh I am quite fond of it but only because of The Lord Of The Rings. Pip could be a v cute nn.

Sorry, missed out:

Juniper - awful
Zara - nice
Isis - lovely
Millicent - awful, and please no more Millys

Ari - like it. has strong connotations with Entourage for me, though
Sebastian - nice, like Seb
Inigo - awful, poncey
Crispin - ditto
Levi - OK, used to ;ove it as big fan of biblical names but it has become fairly common in London
Peregrine - NO
Dexter (the next big thing?) - yes, next big thing or already a big thing
Julius - see Crispin and Inigo

Lois - nice, classy, hadn't thought of it before
Ivy - OK, but bored of grandma chique
Tabitha - NO
Juno - NO
Octavia - NO
Ione - ok, not fabulous for me
Claudia - ok
Juniper
Zara
Isis
Millicent

Ari - quite nice but seems a bit incomplete
Sebastian - good name
Inigo - no, too princess bride
Crispin - seems jokey
Levi - not keen
Peregrine - too much
Dexter (the next big thing?) - cute, don't think it will get that popular
Julius - best one, like it a lot

Lois - don't like it at all
Ivy - pretty
Tabitha - cute
Juno - too trendy because of the film
Octavia - kind of cool but a bit much
Ione - okay
Claudia - nice
Juniper - too much
Zara - pretty
Isis - no, but like iris
Millicent - no

Ari -- potter
Sebastian -- like it
Inigo -- reminds me of inigo montoya from the film princess bride.
Crispin -- dry
Levi -- jeans
Peregrine -- falcon
Dexter (the next big thing?) -- murderer off that tv show
Julius -- nice

Lois --
Ivy -- boring
Tabitha --
Juno -- like it
Octavia -- mmm, not sure
Ione -- like it
Claudia --
Juniper --
Zara -- nice
Isis -- maybe a bit pretentious it being a gods name n'that
Millicent -- old fashioned

Ari - sounds like a cockney version of Harry
Sebastian - no
Inigo - no
Crispin - hell no
Levi - no
Peregrine no
Dexter (the next big thing?) - trendy, surname, yes to next big thing
Julius - I just hear and see Julie

Lois - not bad
Ivy - ok
Tabitha - very nice
Juno - no
Octavia - it's ok, slightly pretentious
Ione - no
Claudia - ok
Juniper - I like but it's a brave choice
Zara - no
Isis - no
Millicent - very nice

I dislike all your boy choices (sorry). I like Tabitha, Claudia and Millicent from the girls with Juniper as a middle name.

Love Sebastian and like Inigo. Dislike Ari, Levi and Crispin. Have no opinion on Dexter but used to teach a lovely one!

Your girls' names are mostly a bit fussy for my liking but I do like Claudia.

Ari - not keen
Sebastian - love it
Inigo - see LetThereBeRock's comment
Crispin - no
Levi - jeans
Peregrine - falcon
Dexter (the next big thing?) - no
Julius - not too bad

Lois - hmmm
Ivy - nice
Tabitha - very nice
Juno - no
Octavia - nice
Ione - lovely
Claudia - not bad
Juniper - hmm...
Zara - not bad
Isis - hmm...
Millicent - god, no.

So, Sebastian or Julius, Tabitha or Ione.