Things I've been learning doing this research:
There are many people with the same name. There are lots of ladies over the years named Marjorie Dewsnap, for example. For really common names, there can be a number of people with the same name, born in the same year, in Los Angeles. This is why it is so important to get the birth year, the middle name or initial, and the spouse or parent or siblings.
(Many people without Ancestry.com's expensive subscription can get it at their local public library. My library even has Ancestry's Canadian and English records. Ask your librarian.)
Mylife.com and Ancestry's "Public Records" are great places to get birth year and city of residence. Prosperous Scientologists are often found in Clearwater or its northern fancy suburb, Palm Harbor, in Florida. In California, they are often found in Tujunga, Glendale, Studio City, Burbank, Los Feliz, North Hollywood, and plain old Los Angeles, all convenient for show biz and trips to the Celebrity Centre. Another cluster lives in Orange County near Tustin. Some have ritzy homes in Malibu or La Canada Flintridge. CoS musicians often live in Glendale or Laurel Canyon, Los Angeles. A person who lives in LA, then Clearwater, then back in LA is likely a Scientologist, so zero in on names in those places first.
Ancestry.com then can give California births and marriages. Florida doesn't have birth records on Ancestry.com; Luckily many Scientologists were born in California, though the records take years to get to Ancestry.
There are surprising spikes in years. For example, The late 1940's birthed a lot of money-making businessmen with financial scandals. 1971 had a lot of actresses.
The "I Am A Scientologist" pages from around 1978 have lots of useful information. "I am the mother of X children." " I have been married Y years." "I am Z years old."
Wikipedia is way out of date, and many of its sources have broken links. Even Tom Cruise's page still shows him owning part of United Artists. Wikipedia is more "interested" than IMDb in getting birth year or birth date and parents, but it is occasionally wrong.
Marriages between Scientologists and non_Scientologists have a very poor track record.
Lots of Los Angeles and Sea Org Scientologists have married in Las Vegas.
Musicians rarely give their birth year and parents, but happily give their birthplace.
Old Myspace pages are often publicly readable, with useful posts like "Happy Birthday."
Tweets are pretty revealing, too. Google "Jill Actress" + "new baby" for leads, and it may lead you to a Twitter page. I'm not listing the babies on this Spiderweb, just saying "child under 18."
If you want to look for girlfriends or boyfriends and can't find any text about them, use "Google Image" and that person's name in quotes. For example, Google-Image for "Erika Christensen" gave hundreds of photos with just her; therefore, no boyfriend.
If you are looking for marriages for say, a young woman named Jane Clear, just google "Jane Clear" + "wedding" and you may get her wedding registry and the name of her groom-to-be, and use further research to verify she is the right "Jane Clear."
Auditor Magazine lists births and other vital statistics. Cerridwen helpfully transcribed many of the magazines. To find them, Google "The Auditor Issue" + "Scientology" You'll find several hits by Cerridwen on "Google Groups." When you are finished with that page, click "Get More Discussion Results" to find many more Auditor Magazines.
When they die, Scientologists rarely have old-fashioned obituaries which list every parent, sibling, children and granchildren. I believe this is because so MANY of them have disconnected family members. However, many Scientologist's parents or grandparents were Catholic, Protestant, or Jewish, and those obituaries were very helpful. Ancestry.com has many obits, but others are freely available on the Internet. To see if "Joe Babyboomer" is named on an obit, Google "Joe Babyboomer" + "grandchildren," since an obit of "Joe Babyboomer's" parent would name Joe and usually several grandchildren.
In one case, Google found an older sister with useful info, from
http://www.findagrave.com . That site focusses on gravestones, which deceased CoS members rarely use due to preference for cremation, so it mostly helps with non-Scientology relatives.
What's ironic is that this Spiderweb, if it persists long enough, will become a genealogical source for people just emerging from their Scientology bubble and not knowing the names of their own grandparents.
* * * * * * *
Special note: I took out the names of the adult children that, despite the Scientology involvement of their parents, had no hits when you Google "their name" + Scientology.
I'm only giving a separate entry to those over-18 second-generation offspring that have their own career going. Those who haven't made a splash yet, but took or are taking CoS courses, will still be listed under their parents.
Anyone who really wants off the list, please tell me.