If the phone was found in a lake I doubt there's any chance of retrieving info from it. I'm sure that's why Karen was asking about the SD card, because the phone is dead.
Short answer, unlikely. It might be that the phone can back up such information, but more likely the card is just used for media. The best I can suggest is to look at the file names: anything that suggests contacts or phone book, or anything with file type vcard or vcf, might contain contact info. XML files may contain almost anything, but can be viewed with a text editor so if there's one of those you may be able to see whether it contains contact details.
On the plus side, if it only contains music and games it's probably not such a loss (unlikely to be the only copy of the music). People get more upset about losing pictures.