Odd One Out

[jfgw]

Which of the following is the odd one out and why?

Alec Guinness
Avril Lavigne
Charles Aznavour
Celine Dion
Cheryl Ladd
Faith Evans
Hugh Grant
Mel Gibson
Pierce Brosnan
Stevie Nicks

Julian F. G. W.

[ReformedCharacter]

Avril Lavigne has the only second name that ends in a vowel.

RC

[AleisterCrowley]

Alec Guinness is the only one to play Smiley on TV...

[jfgw]

Avril Lavigne has the only second name that ends in a vowel.

RC

The answer I am looking for is not quite as simple as that

Julian F. G. W.

[UncleEbenezer]

The answer I am looking for is not quite as simple as that
Julian F. G. W.

It's perfectly valid. As is the similar answer that points out that one of the names has the same number of letters in first name and surname.

One might think your not accepting that answer is a weakness not of the answer, but of the question.

I can't even answer "because I have/haven't heard of [...]", as there are more than one names in each camp.

[jfgw]

One might think your not accepting that answer is a weakness not of the answer, but of the question.

Ok, add Sebastian Coe to the list.

Julian F. G. W.

[AleisterCrowley]

Unusual middle names ?!

[ReformedCharacter]

Which of the following is the odd one out and why?

Alec Guinness
Avril Lavigne
Charles Aznavour
Celine Dion
Cheryl Ladd
Faith Evans
Hugh Grant
Mel Gibson
Pierce Brosnan
Stevie Nicks

Julian F. G. W.

Stevie Nicks because the other names have initials which represent chemical elements.

RC

[jfgw]

Which of the following is the odd one out and why?

Alec Guinness
Avril Lavigne
Charles Aznavour
Celine Dion
Cheryl Ladd
Faith Evans
Hugh Grant
Mel Gibson
Pierce Brosnan
Stevie Nicks

Julian F. G. W.

Stevie Nicks because the other names have initials which represent chemical elements.

RC

Well spotted. Sn is the symbol for tin, however, so not the right answer.

Julian F. G. W.

[ReformedCharacter]

Which of the following is the odd one out and why?

Alec Guinness
Avril Lavigne
Charles Aznavour
Celine Dion
Cheryl Ladd
Faith Evans
Hugh Grant
Mel Gibson
Pierce Brosnan
Stevie Nicks

Julian F. G. W.

Stevie Nicks because the other names have initials which represent chemical elements.

RC

Well spotted. Sn is the symbol for tin, however, so not the right answer.

Julian F. G. W.

OK, last try. Cheryl Ladd because CL is a gas and the others are metals. Never any good at chemistry...

RC

[jfgw]

That's close enough. Chlorine (Cl) is a non-metal whereas all of the others are metals.

Julian F. G. W.