Hi !!!!
I like that
Nia has different origins: Welsh, Swahili, Georgian, English and Japanese.
I agree with you:
Nia is better than
Mia and
Nina because they are nicknames while
Nia is a colourful full name.
Nia Winifred? Uhm..too many "i" and "n". Actually
Nia seems the short of
Winifred so they clash together.
I suggest you
Nia Avalon.
Personal Name Lists
https://www.behindthename.com/pnl/125456