Ebony- A very beautiful name, but doesn't have the photography vibe.
Leica- One of my guilty-pleasure names.
Mamiya- A pretty way to get to Mamie.
Sigma- So long as she's not named after your sorority.
Canon- If Cannon works, why not Canon?
Leaf- The Leif spelling is better, but this makes a nice nature and photography name.
Olympus- Olympic sounding, akin to Olympia and Olympiada.
Ricoh- Like Rico, but for the child of photographers.
Casio- I'm going back and forth on this one for gender. The "O" makes me think boy, but the Cas- makes me think girl. Count this one as unisex.
Kodak- Another nature-photography combo.
Nikon- Probably too associated with the brand, but Nike is a name, so why not Nikon?
Sinar- A unique choice that works for girl or boy.