Can I use DD1's middle name for DD2?

[Maternelle]

I am going out of my mind looking for name for DD2. The criteria are pretty complex as DH is irish, I am breton and it has to work in France and the UK.
It took us ages to find a name but am having second thoughts. My favorite name always was DD1's middle name.
DH vetoed it saying we can't have it now for DD2's first name.

Do you think it's a no-no?

My sister and I have the same middle name. As it's been a family tradition for 4+ generations. Stopping with my children.

Here is a lovely name derived from the Cornish/Breton languages, any use?

Armorel 'dweller by the sea'