Incoming links: Michigan State University
Larry Page's father.
Carl is mentioned in The Google Story Chapter 2 "When Larry Met Sergey".
He divorced from Larry's mother Gloria in 1980 or 1981, "when he [Page] was eight years old" according to The Google Story. He then moved on to Joyce Wildenthal, another MSU professor. Larry had a good relation with both Gloria and Joyce:
Larry came to feel that he was showered with love and wisdom from two mothers: his real mom, and Joyce Wildenthal, a Michigan State professor who had a long-term relationship with his dad.
His obituary on the website of the Michigan State University, where he taught most of his life: www.cse.msu.edu/Alumni_Friends/Alumni/PageMemorial.php:
Page served as CSE’s [MSU Department of Computer Science and Engineering] first graduate director and had a critical role in promoting the department’s research mission. In 1967, when he joined MSU, the computer science program consisted of only undergraduate courses. Just three years later, the department offered eighteen graduate courses in computer science.[...]Page taught courses in Automata and Formal language theory and Artificial intelligence. He was a beloved teacher and mentor to innumerable students until his death in 1996.
Carl Victor Page's obituary by Matt Collar
. Source. 
Presumably printed on the The State News, student newspaper of the Michigan State University.
Found by Googling into his Wikidata entry: www.wikidata.org/wiki/Q15791098 which cites this random German Wikipedia page: de.wikipedia.org/wiki/Carl_Victor_Page which cites the obituary from this WordPress blog: tao221.wordpress.com/ TODO find the page of the blog that uses that image.
Carl Victor Page Memorial World Wide Web Page
. Source. Another useful hit from tao221.wordpress.com found by... Googling! Contains the best photo of Carl we've found so far. The screenshot seems to be a Ctrl + P of some website, if only the author knew about Wayback Machine! The links on that screenshot would be of interest. The screenshot also mentions other family members:
- Carl B. Page, with a cpsr.org/ email. A brother maybe? www.legacy.com/us/obituaries/detroitnews/name/carl-page-obituary?pid=182235576%26utm_source%3Dfacebook%26utm_medium%3Dsocial%26utm_campaign%3Dobitsharebeta mentions a Carl B. Page from Michigan who died in 2010.
- Joyce Wildenthal, Carl's partner, with a pilot.msu.edu email. TODO what is
pilot?
Larry Pages's older brother.
It is hard to find information on this little bugger! Not a single photo online!
As suggested by the "Jr.", he is named after Larry's father, Carl Victor Page.
Carl Jr. is mentioned in a few places in the book The Google Story. The full name "Carl Victor Page Jr." is never given in that source, only "Carl Page Jr." is used. These crazy Anglo-Saxons and their semi-optional middle names!
The Google Story does not cite its sources, but it likely got much of its insider information through interviews, e.g. Chapter 2. "When Larry Met Sergey":which suggests the authors actually interviewed Carl Jr., since interviews with Carl Jr. cannot be found anywhere else on the Internet. It would be interesting to know more how they got that level of access.
Carl Jr. recalls Larry as an inquisitive younger brother with wide-ranging interests
Chapter 2 mentions that Carl Jr. is nine years older than Larry. Therefore, he must have been born in 1963 or 1964. It also states that Carl studied at the University of Michigan, like his father and like Larry would also do later on:
He also enjoyed helping Carl Jr. - who was nine years older - with his college computer homework when Carl came home from the University of Michigan during breaks.Their father was a professor at the Michigan State University, which is a different university from the University of Michigan, and not in the same city, so by breaks they mean term breaks.
Chapter 2 also mentions that he was working in Silicon Valley by the time their father died in 1996:
Despite his grief [for the death of their father at the early age of 58], Larry remained enrolled at Stanford. It helped that his older brother, Carl Jr., lived and worked in Silicon Valley. They had each other, so Larry wasn't left to bear the loss alone, and the two spent time together, fondly recalling their dad and reflecting on their childhood memories.
In 1997, Carl co-founded the mailing list management website eGroups together with Scott Hassan, programmer of an early version of Google when he was a research assistant at Stanford University. Carl and Scott presumably met through Larry, but we don't have a source. The company was sold to Yahoo! in 2000. The Google Story Chapter 8. "A Trickle" mentions:Carl is listed as a co-founder in the SEC filing: www.sec.gov/Archives/edgar/data/1105102/0000950149-00-000584.txt as "Carl Page". He does not appear on the 5% stockholders however, poor Carl.
Google's deal with Yahoo!] had special significance for Larry Page, since his brother, Carl Jr., also was in serious negotiations with Yahoo! over a major business transaction. The following day, June 27, Yahoo announced plans to buy eGroups, a technology firm that Carl Page had co-founded, for $413 million.
In 2006, he brought a company he founded called "Handheld Entertainment" public through a reverse merger with a shell company: archive.nytimes.com/dealbook.nytimes.com/2006/03/21/brother-of-google-co-founder-uses-shell-company-for-handheld-start-up/. "Handheld Entertainment" made an iPod competitor apparently. SEC filing: www.sec.gov/Archives/edgar/data/1309710/000095013606009480/file1.htm.
September 27, 2023 marked Google's 25 th aniversary and the page cirosantilli.com/carl-victor-page-jr had a small surge of views according to Google Analytics. On that day, this page was one of the top Google search results for "Carl Victor Page, Jr."[ref]. Wikipedia also had a large bump in searches for "Larry Page" on the same day: pageviews.wmcloud.org/?project=en.wikipedia.org&platform=all-access&agent=user&redirects=0&start=2023-09-11&end=2023-10-01&pages=Cat|Dog|Larry_Page which must be the root cause, Larry actually managed to beat "Cat" and "Dog" on that day.
Not to be confused with the Michigan State University. Not confusing at all right!