Girls names suggestions like Emily/Amelia but not so commonly used?

[elpth]

My friends have a little boy called Isaac and are struggling to decide on a name for his little sister, due this month. So I've told them Mumsnet is really useful for this sort of thing!
They like names like Emily, Amelia etc but would prefer something less popular.
Please help! Many thanks

Ailsa, Serena, Esme. Amelia/Amelie both quite popular and overused round these parts (south London).

Thanks everyone! Emma was my suggestion the other night biased as I have a lovely cousin Emma and lots of these names are lovely though it's obviously not my choice! Think we're giving them ideas and food for thought though, which was the whole idea so thank you. We're in Scotland which makes a slight difference in terms of what's popular (and means names like Eilidh are possible too though that's ruled out as a pain to spell )

If in Scotland then maybe Aileen?

Anna, Emma, Cassie, Charlotte, Madeleine, Abigail.

I have an Isaac, and his little sister is Lois

As you are in Scotland, Ailsa.

Julia