Who begat who?

Shockley Semiconductor Laboratory
was founded by William Bradford Shockley
Fairchild Semiconductor
was founded by The "Traitorous Eight" / "treacherous 8":
engineers and scientists who resigned from Shockley Semiconductor Laboratory in 1957
Intel
was founded by Robert Noyce and Gordon Moore
who left Fairchild Semiconductor
to create a company focused on semiconductor memory and microprocessors.

Fairchild responded by hiring Lester Hogan as the new CEO
(Hogan worked under Bill Shockley at Bell Labs).
"Hogan's heroes" were the 8 other Motorola employees who moved with him.
Zilog (later absorbed by IXYS then Littelfuse)
was founded by Federico Faggin, Ralph Ungermann and Masatoshi Shima
who all resigned from Intel

AND THUS ZILOG WAS BORN!

Here's a fun video about Zilog's founders:

Intel's Worst Nightmare

(Please forgive the stock footage and computer generated images
for the story is compelling:
the glorious culture clash of Italian vs Japanese manners!)

Zilog's primary founders:

Federico Faggin
Led the development of the Intel 4004, 8008, and 8080 at Intel before leaving to found Zilog.
He served as president and CEO of Zilog until 1980.
Ralph Ungermann
Left Intel to co-found Zilog
He was involved in developing support and peripheral chips.
Masatoshi Shima
joined the company in early 1975 to perform the detailed design of the famous Z80 microprocessor,
Shima deserves recognition for his critical role in the company's early success.

The other branch of the family tree: How does the Motorola fit into things ?

Several key people from the Motorola 6800 project left Motorola
when management failed to see the merit of a low cost microprocessor.

MOS Technology was formed by 3 former General Instrument executives:
John Paivinen, Mort Jaffe and Don McLaughlin

Chuck Peddle and Bill Mensch left the Motorola 6800 team to create the MOS 6502 microprocessor.

citing GOOGLE AI:

The development of the Motorola 6800 microprocessor in the early 1970s
was primarily driven by a team in Phoenix, Arizona,
led by Tom Bennett,
who was hired away from Victor Comptometer (a calculator company) to lead the effort.

However, the more famous story regarding "stolen" or lost talent
in the context of the 6800 occurred in 1974,
when a significant portion of that design team left Motorola to join MOS Technology.

Key talent that left Motorola included:

    Chuck Peddle
    Bill Mensch
    Rod Orgill
    Harry Bawcom
    Wil Mathys
    Ray Hirt
    Mike Janes
    Terry Holdt