Want a rare name for a girl? Is this the rarest?
As a pediatrician with decent experience (Moscow) I recommend:
Natasha, Lena, Olya and Light.

They will be almost unlikely to meet the weight in the kindergarten, school, etc. Guarantee of 99.999% on discount.

I will not tell for the whole professional life, and in the last 5 years I met 1 (!) Lena and 1 (!) and OLA. I don’t remember Nathan at all.
But Fevronia in a diaper and Cassandra's blistering bubbles don't surprise anyone)

Raw carapuz Valerian is 2.5 years old. You ask him: What is your name, Valkyrie? The valley?
and Valerian.
What is your name, grandmother?
and Valerian.
So you imagine: "Valerian, Monsieur Cher, you are once again crowded! Be kind and behave properly!"