A Game of Names

For 2 or more players

Rules: One player says the name of a famous person. The next person has to think of someone whose first name starts with the first letter of the previous person's last name. When both names start with the same letter the order of play is reversed.

E.g.
Player 1 - "Barack Obama"
Player 2 - "Orson Welles"
Player 3 - "Wayne Rooney"
Player 4 - "Robert Redford"
Player 3 - etc

You could make this harder by specifying a category (film stars, musicians, politicians....).

Anyway, we tried to come up with as many double letter names as possible a few months ago, and then recently I tried to list one name for each letter and came up with the following list, which I hope doesn't say anything too worrying about what goes on in my head. I did try to think of real people for all of them, but failed. Any suggestions for filling the gaps?

Alan Alda
Bill Bailey
Calvin Coolidge
David Davis MP (or, confusingly, David Davies MP)
Dame Edna Everage
Freddie Flintoff (although his real name is Andrew)
Germaine Greer
Harriet Harman
I ?
Jesse Jackson
Kevin Keegan
Laura Linney
Magnus Magnusson
Nyron Nosworthy
Olive Oyl
Peter Purves
Q ?
Robert Redford
Simon Schama
Thomas Truax
U ?
Vince Vaughn
Wincey Willis
X ?
Y ?
Z ?