Actually, We considered using
Seren (seriously).
I had a friend in school named
Seren and no one ever commented on it's similarity to
Sarah or sarin. I heard the reference a lot when were testing out names to friends, but I think that the average person wouldn't make the connection.
Adore
Lavender and
Marigold. Shot down by DH, but I secretly think they are usable. Especially if you are a
Roald Dahl fan (character in
Matilda)