Some notes on your Welsh names:
The -wen ending is used for girls, the -wyn ending is used for boys. People ignore that here in the U.S. [name_f]Bronwen[/name_f] would be the traditional spelling. I see you’re in the U.K., and from what I read around, [name_f]Bronwyn[/name_f] might be the [name_f]England[/name_f] spelling of it (as there is not a masculine form of the name in Welsh), so it is up to you if you want to be true to the Welsh original. I voted for [name_f]Bronwen[/name_f] because I am a fan of honoring the original spellings.
Gwenne technically isn’t a name. The variations are [name_f]Gwen[/name_f] (Welsh)/[name_f]Gwenn[/name_f] (Celtic/[name_m]Breton[/name_m]).
Is the last name pronounced “ZIGH-uh” (like almost rhymes with “eye”) or “ZAY-uh,” because that would change my vote. If it has the long-I sound, I’d vote Zaia; if it’s a long-A, I’d vote Zeya.
Breah = ?? I wanted to say “bread” at first, but after looking at it I guess I’d go with [name_u]BRAY[/name_u]-uh?
[name_f]Bria[/name_f] = [name_f]BREE[/name_f]-uh
[name_f]Calah[/name_f] = CAW-luh
[name_f]Calla[/name_f] = [name_u]CAL[/name_u]-uh
Zaia = ZYE-uh
Zeya = ZAY-uh or [name_f]ZEE[/name_f]-uh
I voted for [name_f]Bria[/name_f], [name_f]Bronwyn[/name_f] (I know it’s technically the masculine spelling but I think it looks nicer), [name_f]Calla[/name_f], and [name_f]Gwen[/name_f] for the first 4 but idk how you want Zaia/Zeya to be said so I didn’t vote.