Middle names for Fionnuala and Eoghan?

[parmo]

We don't really do the whole naming after a family member so just want names that sound 'nice' with our chosen first names (although we haven't fully decided on Eoghan for a DS yet, there are others we love). Ideally we want a strong english name to represent the heritage of our DC (DH Irish, I'm English). Other DC's middle names are Frederick and William.
To go with Fionnuala we already have a few ideas, what do you think of -

Fionnuala Primrose
Fionnuala Verity
Fionnuala Charlotte

Since we've not yet fully decided on a boy's name it's a bit tricky finding a middle name!

Even so what would you suggest and what do you think of the combos we've already considered?

I like your girl's name suggestions. Would something with fewer syllables than Fionnuala sound better?

Fionnuala Bridget
Fionnuala Mary

Eoghan Alexander
Eoghan James

Fionnuala Catherine
Fionnuala Harriet

Eoghan George
Eoghan Henry

Fionuala Maeve

I think Fionnuala Maeve is a bit too Irish IYSWIM? Our other two have English middle names so we want to keep it the same :)

Of your three I prefer the sound of Fionnuala Charlotte but it does give initials FC so she might sound like a football club. How about:

Fionnuala Harriet
Fionnuala Jane
Fionnuala Katharine
Fionnuala Maud
Fionnuala Victoria

Fionnuala Maud or (Jane: the multi-syllable followed by a single is very rhythmic); and Eoghan George/Henry/James all good, the exotic along with the mundane ... ye, nice sense of balance. Incidentally, how DO you pronounce Eoghan???

Eoghan = Owen