JavaScript naming convention for promises?

I feel it would be useful to have a naming convention for JavaScript variables which hold a promise. I don't generally like or advocate naming conventions beyond programming language standards, but in the style of programming where promises are passed around as function arguments it's often hard to tell at a glance whether a variable holds a promise or the "real thing".

I've personally used promiseOfFoo and pFoo, but I find the former a bit verbose, and the latter gives me flashbacks from Hungarian.

Is there a commonly used convention?