Heather! I always love seeing your posts. You have such stunning names on your list.
1. Gwen Cordelia
I think Gwen Susanna is a little "n" heavy. For me, it ruins the flow a little.
2. Helena Iris
As much as I love Daphne and Florence, I think since Helena ends in the "na" sound and both middles have strong "n" sounds, I have the same problem as with Gwen Susanna.
3. Sasha Beatrix
Sasha Juliet was hard for me to pronounce.. not sure if it was me or if others had the same problem?
And though I adore Penelope, I'm not sure if the style of both names clashes a little.
4. Eliza Florence
Though I love how Helena Florence looks, I think Eliza Florence is gorgeous.
5. I couldn't pick for this one, I'm sorry!
I really like how Cordelia June sounds, but Jane is just such a classic.. It's a draw for me!
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6. Malcolm Arthur
I think the flow of Malcolm Arthur is better. I do prefer Arthur as a first name, but there's something about this combo that I like.
7. Clark
Harvey comes second and then Arthur for me.. Is there a reason you couldn't use all three?
8. Damian Clark
I think I have slight OCD when it comes to flow. I tend to go with a longer first name and a one or two syllable middle name. I think Clark Damian would be a more interesting combination, but I can't get over what I'd usually pick.
9. Dexter Benjamin
I adore this one, it wins hands down! Cassidy is nice, but I like how you paired Dexter with a slightly more traditional and common name. It makes it a little more masculine.
10. Quentin Oliver
As much I love both Harvey and Oliver and how they look, I can't let go that when I say them, it's a very "v" heavy combo.
Oliver Quentin would also be lovely.
Also:
Gwen Cordelia -or- Cordelia Jane
Helena Daphne -or- Eliza Florence
Sasha Penelope -or- Gwen Cordelia
Malcolm Arthur -or- Dexter Benjamin
Quentin Oliver -or- Malcolm Arthur
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Damian Clark -or- Harvey Damon?
I couldn't pick! I really like your idea of Harvey Damon, but Clark is just too adorable to pass up!