Claviger? Turns out, that is the correct word for Keyholder!

[Aarkey]

http://www.merriam-webster.com/dictionary/claviger

claviger - noun clav·i·ger \ˈklavə̇jə(r)\ plural -s
: one that keeps the key or keys : custodian, warden

Why wasn't I notified about this until now?!?

[jfenoffti]

claviger -- cleavage
hmmmm, wonder if the root is the same.
Coincidence?

[Tom Allen]

http://www.merriam-webster.com/dictionary/claviger

claviger - noun clav·i·ger \ˈklavə̇jə(r)\ plural -s
: one that keeps the key or keys : custodian, warden

Why wasn't I notified about this until now?!?

That's odd. An "autoclave" is not a self-activating key.

A clavier is an old keyboard instrument, though.

[Dukestoy]

https://en.m.wiktionary.org/wiki/claviger
Wiktionary has an alternative definition of "one who carries a club". Pain and pleasure, eh?