A sister for Merryn?

[asister]

We have a dd called Merryn. I love it because (imho!) it's cheerful, celtic, pretty but not "frilly"

But I don't know what her sister should be called! Any ideas?

If baby is a boy, he will be Magnus.

Thanks in advance!

Imogen?

Hazel
Emma

I know a Merryn with a sister called Tasmin...not Tamsin. Gets shortened to Taz which really suits her!