[name]Mabel[/name]
[name]Harper[/name]
[name]Eliza[/name]
[name]Jane[/name]
[name]Matilda[/name]
[name]Mercy[/name]
With [name]Ashby[/name], which has a somewhat unisex, surnamey type vibe to it, I think [name]Harper[/name] would be the best match stylistically. However, I’m not sure about [name]Harper[/name] Holloway, it just seems a bit cartooney to me.
Your other names are fine with your surname, but they just don’t seem to pair up too well with [name]Ashby[/name], without making her seem like a boy, if that makes sense - they’re much more feminine, and I’d expect [name]Ashby[/name] and [name]Matilda[/name] to be brother and sister rather than two sisters, while [name]Ashby[/name] and [name]Harper[/name] are more similar to be sisters, if that makes sense.
Other suggestions, using your names as middles:
[name]Morgan[/name] [name]Eliza[/name]
[name]Piper[/name] [name]Mercy[/name]
[name]Marlo[/name] [name]Jane[/name]
[name]Brooke[/name] [name]Matilda[/name]