David Grawrock

David Grawrock

Privacy Level: Private with Public Biography and Family Tree (Yellow)
David Grawrock
Born 1950s.
Ancestors ancestors
Son of DNA confirmed and [private mother (1930s - unknown)] DNA confirmed
Descendants descendants
Father of [private son (1970s - unknown)], [private son (1970s - unknown)], [private son (1980s - unknown)], [private son (1980s - unknown)], [private son (1980s - unknown)], [private son (1990s - unknown)] and [private daughter (1990s - unknown)]
Profile manager: David Grawrock private message [send private message]
Account confirmed 16 Sep 2019 | David's 4551 contributions | 12 thank-yous received
Profile last modified 24 Mar 2020 | Created 16 Sep 2019 | Last significant change: 24 Mar 2020
14:40: Eowyn Langholf added the 13 Ancestors in 13 Weeks badge for David Grawrock. [Thank Eowyn for this]
This page has been accessed 937 times.
Wiki Genealogist 13 Ancestors in 13 Weeks Sourcerer Data Doctor 2020 52 Ancestors Challenge New Netherland Project Member Profile Improvement Project Member Pre-1700 Honor Code Signatory Volunteer DNA Tested GEDCOM Equipped Scan-a-Thon 2020 February 2020 Club 100 January 2020 Club 1,000 December 2019 Club 1,000 November 2019 Club 100 October 2019 Club 100 September 2019 Club 100
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David is a participant of the Integrators Challenges
This user is a native speaker of English.



David was born in the 1950's to Tom Grawrock and Cyphert in Tennessee. His father being the the US Navy, they moved often. David spent 6 wonderful weeks in Tennessee, has very found memories, and hasn't been back since. A succession of transfers and cruises had David living in Massachusetts, Rhode Island, Long Island, Florida, San Diego, Guam, China Lake, and then Poway. He graduated High School from Poway High.

He married his high school sweetheart, Parker in the Church of Jesus Christ of Latter Day Saints, Los Angeles Temple in the 1970's.

David was a member of The Church of Jesus Christ of Latter-day Saints.

Moving around chasing jobs the family lived in San Diego, Poway, Pocatello, San Jose, West Valley City, South Jordan, Londonderry, and Aloha. His career in high tech took him to some industry leaders including Lotus Development, Central Point/Symantec, and finally Intel, from which he retired in the 2010's.

David was intimately involved with the Trusted Computing technologies[1] which started development in the early 2000's. He was the workgroup chair and editor of the Trusted Platform Module (TPM) specification. Which is standardized by International Standards Organization (ISO) as ISO/IEC 11889-1 [2]

After retirement, they moved to Southern Utah where David is working on his passions of hiking, photography, and, oh yes, genealogy.

Famous Relatives

Currently, unless one goes way back, there are not really any famous relatives. They are a mixed group, but just ordinary people who've lived life.


On a personal note, John Grawrock was an inventor. But also a gambler and supposedly lost his company to those who he owed gambling debts.[3] What is interesting is that David is also an inventor. His list of patents is at the US patent office.[4]

His goal is to have more patents than John. Currently, as of 27 Dec 2019, David is at 79 and John at 3. The issue is that it's very difficult to directly search for patents prior to 1972. The 3 currently located ones were all filed and issued on the same days. See John Grawrock for the list.


David's current to-do list.


For maternal links, Cyphert also performed an AncestryDNA test and all details are under that person.


Research for additional lines are on the research page


Paternal relationship is confirmed by an AncestryDNA triangulation between David Grawrock and 5 other descendants of Jens Jensen and Ingeborg Eivindsdatter

Maternal relationship is confirmed by an AncestryDNA test match between David Grawrock and his mother Cyphert. Predicted relationship from AncestryDNA:parent and child, based on sharing 3,456 cM across 59 segments

Grand Parents

Maternal Relationship to Dave Wyman Cyphert and Marge Brauner confirmed by an AncestryDNA test match between David Grawrock and Dave Blyth.

Great Grandparents

2nd Great Grandparents

Paternal Relationship to Thomas Cockburn and Elizabeth Ellison confirmed by an AncestryDNA test match between David Grawrock and Elinora Platt.

Maternal Relationship to Benjamin Sexton and Maggie Bible confirmed by AncestryDNA test match between David Grawrock and SM a child of Dixie Carolyn Daub. Predicted relationship is 3rd cousin based on sharing 134 cM over 7 segments.

3rd Great Grandparents

4th Great Grandparents

Maternal Relationship to William Lishman and his wife Elisabeth Wrightson is confident but not confirmed by triangulation between 5 different AncestryDNA test matches.

Paternal Relationship to Ralph Herron and Isabella Welch confident but not confirmed with AncestryDNA match between David Grawrock and BE descendant of Rachael Herron

Incomplete Triangulations

Paternal relationship to Thomas Humble and Margaret Solomon confident with one leg confirmed

Paternal relationship to Hans Jacobsen and Sigri Ingebrethsdatter confident with one leg confirmed MyHeritageDNA


  1. Trusted Computing Group online [1]
  2. ISO/IEC 11889-1 Information technology — Trusted Platform Module — Part 1: Overview. Online at [2].
  3. Personal recollection of Tom Grawrock as told to David Grawrock many times over the years.
  4. US Patent and Trade Office, "USPTO Patent Full-Text and Image Database" (Online: USPTO, updated daily) Quick search at [3]. Search for Grawrock as inventor accessed 9 Jan 2020 with 79 issued patents
  • First-hand information. Entered by David Grawrock at registration.

More Genealogy Tools

Only the Trusted List can access the following:
  • David's formal name
  • e-mail address
  • exact birthdate
  • birth location
  • images (1)
  • private children's names (7)
  • spouse's name and marriage information
For access to David Grawrock's full information you must be on David's Trusted List. Please login. See the Contact section of the Tree & Tools page.

Sponsored Search

Followed Tags
David is a Wiki Genealogy Volunteer following these tags:
Would like to help with adding to WikiTree
Will start with my own but will strive to have my tree with no:errors
From Norway
Connect into this through Marinus King
Following paternal line through Norway
Starting with my own, but will clean up any profile i come in contact with.
I've made so many mistakes over the years not getting things down correctly that i want those who follow me not to have those issues.
I like a little saturday fun
I'd like to help with the programming of WikiTree. I'm a retired engineer, i've shipped lots of software and hardware over the years.
DNA Tested
David Grawrock's DNA has been tested for genealogical purposes. It may be possible to confirm family relationships by comparing test results with David or other carriers of his ancestors' Y-chromosome or mitochondrial DNA. Y-chromosome DNA test-takers in his direct paternal line on WikiTree:
  • David Grawrock: Family Tree DNA Y-DNA Test 67 markers, haplogroup R-M198, FTDNA kit #176522
It is likely that these autosomal DNA test-takers will share DNA with David:

Have you taken a DNA test? If so, login to add it. If not, see our friends at Ancestry DNA.

Comments: 7

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Hi again David,

I noticed that you added the tag for Profiles. We have a Profile Improvements Project (PIP) if you are interested. You can read more about it on the Project home page. I hope you will consider joining us.

Debi ~ PIP co-leader

posted by Debi (McGee) Hoag
I was trying to join, but I put my intro into the biobuilders and not profiles. Grin, I’ve still got lots to learn about WikiTree.


posted by David Grawrock
Hi David,

I sent a private message on 25 December in response to your answer on the Profile Improvements Project join thread. I haven't heard from you so wanted to check to make sure that you received that message. Please let me know.

Thanks, Debi

posted by Debi (McGee) Hoag
Hi David,

Thanks for taking the Pre-1700 Quiz!

Pre-1700 ancestors can be shared by many descendants, so collaboration is essential. You can learn about joining the community in How To #3 and in the Project FAQ.

The Norway Project may fit your research focus. If not, use the Pre-1700 Projects list to find other possibilities. Review the project page to learn about resources and guidelines as well as how to collaborate with the project members.

Have questions? Click my name, then ask in the comments on my profile.

Debi ~ Pre-1700 Greeter

posted by Debi (McGee) Hoag
Hi David

How is it going so far. were the How-Tos pages helpful or did they leave you with questions? Questions ask in our G2G forum Click Here  

Clicking your green tags shows members who follow that tag. Add tags other family surnames, for locations add 2 tags NORWAY & UNITED_STATES The tags link you to the community sourcing & research options.

We want to help you learn about the site and the community, hopefully you found the pages and links useful. Check out our Videos Click Here

Janet ~ Wikitree Messenger

P.S. If links do not work in an email from WikiTree click in the comment box in your profile

posted by Janet (Langridge) Wild

You are now a full member and can add your family to the big tree!

Start with our New Member How-To pages. These will save you a lot of time and answer many of your questions as you begin to add your family tree.

We are delighted that you have decided to join us and hope you will have many pleasurable ancestor hunts!

Please let me know if you have any questions. I'm always happy to help!


P.S. If links do not work in an email from WikiTree, try them from the comment section on your profile page.

Welcome David

This is just a note to say hi and to let you know that I'm available to answer questions about joining WikiTree.

To contact me, click the link to my name, then send a private message or post a comment on my profile page.

Wendy ~ WikiTree Greeter

P.S. If you did not receive a notice to confirm your email, check your spam folder or use this link to request a new one. If links do not work in an email from WikiTree, try them from the comment section on your profile page.

David is 21 degrees from Alice Paul, 15 degrees from Michael Schell and 20 degrees from Henry VIII of England on our single family tree. Login to find your connection.