Wdyt....

What do you think of [name_f]Sunniva[/name_f] [name_f]Paige[/name_f]? If you don’t like it, then suggest different middle, since I been looking for short strong middle name for [name_f]Sunniva[/name_f].

Other options:
[name_f]Sunniva[/name_f] [name_f]Bridget[/name_f]
[name_f]Sunniva[/name_f] [name_f]Tempest[/name_f]
[name_f]Sunniva[/name_f] [name_f]Gwen[/name_f]
or [name_f]Sunniva[/name_f] — something-else

[name_f]Sunniva[/name_f] [name_f]Paige[/name_f] is alright, but I feel like [name_f]Paige[/name_f] can sometimes come off as fillery in the middle. Out of the ones you listed, I like [name_f]Sunniva[/name_f] [name_f]Gwen[/name_f] the best. [name_f]Gwen[/name_f] is familiar, so it grounds a more obscure name like [name_f]Sunniva[/name_f], but it’s not boring or fillery. Not to mention I feel like both [name_f]Sunniva[/name_f] and [name_f]Gwen[/name_f] match well stylistically.

I love [name_f]Sunniva[/name_f] [name_f]Tempest[/name_f]

[name_f]Paige[/name_f] seems a little drab following [name_f]Sunniva[/name_f], though there’s nothing really wrong with it. Along the lines of [name_f]Sunniva[/name_f] [name_f]Gwen[/name_f], maybe [name_f]Sunniva[/name_f] [name_u]Quinn[/name_u] or [name_f]Sunniva[/name_f] [name_u]Wren[/name_u]?

I like [name_f]Sunniva[/name_f] [name_f]Paige[/name_f]. It sounds upbeat and the flow is bouncy. I don’t think [name_f]Paige[/name_f] comes across as a filler. I like this combo the most out of the ones you listed.
[name_f]Sunniva[/name_f] [name_f]Tempest[/name_f] is my second favourite.