I wonder how it was/is pronounced. Eem? Emmy? Em?
The problem is that you don't know (neither do I), which means that everybody your child meets/encounters/communicates with also won't know - and they, unlike you, won't be inclined to look it up, they'll just take a vague guess or fumble around.
It's the difference between "Hello, could I speak to Emma, please" and "Erm, hi, yes, I've been told I need to speak to, um, is it Eem? Emmy? Emmay? Sorry, I've never come across that name before," often followed by having to explain again and again how she came to have that name, why her parents chose it, what her heritage is - many, many times throughout her whole life.
There's every chance that it's a lovely, pleasant-sounding name, but nobody wants a name that ends in a question mark every time they meet somebody new.
Sorry, not meaning to be down on it - just trying to think realistically.