
Do you know Daniels’ first name? No?
At least we know the first letter of it.
The Alien Covenant Phobos short reveals that the first letter of her first name is an 'R'!
Stills from the Phobos video:
What is her first name?
Rose? Ruth? Rachel? Rebecca?
Or Ripley? Yes, it can be a first name, too. :)
Is Daniels’ first name a secret? If so, why is it a secret?
Toby Dye official site:
http://www.tobydye.com/films/phobos/
You can find the Phobos video on the Blu-ray (August 15th).

Daniels "Dany" Branson
"He survived, he’s now in Disneyland in Orlando, and no way am I going back there. How did he end up in Disneyland? I saw him in Disneyland, Jesus Christ!"

I'm not sure how reliable that is, though, since Oram is listed as a security officer instead of the executive officer, and his first initial should be C instead of P. Some of the other names don't ring a bell, either (apart from Tennessee, Lope, Hallet, and Walter).

DG - Good points, perhaps another Oram, or more first names, or he was a private previously? :)