Welsh girl names - Help

[Cookalia]

We are really struggling with girl names.
It needs to be Welsh but work in Welsh speaking Wales and English speaking Wales and can't have a LL in it.

We have tended to like 'dated' names over current popular ones.

Megan, Bethan, Rhian, Carys etc are all nice but too run of mill.
Siân and Sioned also can't be used and nothing that begins with a T

@Destroyedpeople

I know an Elan....

Male or female? Sounds masculine to my ear? Names after Elan valley/lake?

I also know an Elan ....she is a twin to Katy

I know 2 Elans, both female.
The place name Dolwyddelan's origin isn't clear. Either from Elen or Gwyddelan according to wiki.

Another name I'd consider is Philip. The welsh spelling is Phylip, pron slightly differently is quite rare.

Eleri
Catrin
Mali
Mari
Eiri
Eirlys
Lwsi
Mabli
Arianwen
Anwen
Menna
I have a Ffion but its so popular