of which the name

[sitifan]

1. He's written a book whose name I've forgotten.
2. He's written a book of which the name I've forgotten.
#1 is supposed to be correct. Is #2 also acceptable?

[emsr2d2]

1. He's written a book whose name I've forgotten.
2. He's written a book of which the name I've forgotten.
#1 is supposed to be correct. Is #2 also acceptable?

He's written a book, the name of which I've forgotten.

Note: I have completely edited my response as when I went back and read it I realised my original answer was terrible!!

[Raymott]

I don't like any one of the above, except 1. and:
He's written a book, the name of which I've forgotten.

[5jj]

I don't like any one of the above, except 1. and:
He's written a book, the name of which I've forgotten.

My feeling also.