"We" vs. "Us" at the beginning of an objective clause

Do I write, "For we who are getting old..." or "For us who are getting old..." I know that "us" is the objective pronoun, but which do I use when the pronoun begins a clause that is the object of a preposition?


Solution 1:

If you are going on to speak of something that applies to 'us', it's 'for us'. The phrase 'who are getting old' identifies the 'us' being referred to.

For us... it's a question of...

If you meant 'for' in the sense of 'because', it would be different.

For we who are getting old [do this].