Looking on the internet deeply has found these results:

I don't know of any is the most popular phrase on the web.

I don't know any of them 1713,000 results on the web	I don't know of any 122,900,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I don't know how any of them got elected. First, I don't know any of them and secondly, my buddies always wear masks. No, I don't know any of them. I don't know that any of them do. I don't know why any of them do. I don't know any Keith Colliers. I don't know where any of them are. I don't know any Frank Prentice.	I don't know of any relatives in Luxembourg, definitely no one who would name me in their will. I don't know of any infectious agent That could cause this kind of coordinated obsession. I don't know of any such letters. I don't know of any such house. I don't know of any ancient sites in Maine. He was perfectly all right and I don't know of any financial worries. I don't know of any relatives in Luxembourg, definitely no one who would name me in their will. I don't know of any precedent that allows a man to refuse a decoration.

I don't know any of them

1713,000 results on the web

I don't know of any

122,900,000 results on the web

More popular!

I don't know of any relatives in Luxembourg, definitely no one who would name me in their will.
I don't know of any infectious agent That could cause this kind of coordinated obsession.
I don't know of any such letters.
I don't know of any such house.
I don't know of any ancient sites in Maine.
He was perfectly all right and I don't know of any financial worries.
I don't know of any relatives in Luxembourg, definitely no one who would name me in their will.
I don't know of any precedent that allows a man to refuse a decoration.