How do you say "Carl Sagan"?

Question

Pronunciation

Answer 1

Cl sgan.

Answer 2

Dictionary.com lists two pronunciations -

sey-guhn and sa-gahn

The listing was for Carl Sagan and not a similar word.  I've always heard and assumed the first one was correct.

Answer 3

Sagan like President Reagan

Answer 4

Car-al Say-gen

Answer 5

CAR-ul SAY-gun

Answer 6

Karl  Say-Gan.

I've heard his widow talk on the radiolab podcast.  I'd expect her to get it right.  They repeat the shows from time to time.  But most of the shows are really well done, and, they're free.