My complete academic genealogy (research done by "academic sibling" Brian Levine):
0.
PhD 2005 from UC Santa
Cruz.

My advisor is J.J.
Garcia-Luna-Aceves. Professor at UC Santa Cruz, Computer
Engineering Department. PhD 1982 from the University of Hawaii,
Electrical Engineering. JJ keeps a list of my academic siblings.

J.J.'s advisor is Franklin
F. Kuo.
Professor at Univ of Hawaii. PhD 1958 from Univ. Illinos
Urbana-Champaign, Electrical Engineering. He was
director of the landmark ALOHA project, which is why JJ went to study
there. (More
details.)

Frank's advisor was Mac Van
Valkenburg.
Professor at UIUC, EE. (1923-1997). PhD 1952 from Stanford University,
Electrical Engineering. Dissertation title, "Polarization and Fading
Studies of Meteoric Radio Echoes". The last two photos show Kuo with
Valkenburg. In 2004, the IEEE Education Society began an annual Mac Van Valkenburg Early Career Teaching Award.
According to the IEEE, "Dr.
Van Valkenburg joined the faculty at the University of Illinois in
1955. From 1966 to 1974, he served as professor and head of
electrical engineering at Princeton University before returning to the
University of Illinois." He was named to a chaired position and was a
Dean of Engineering. He "authored of seven textbooks, was a member of
the National Academy of Engineering, he received the Lamme Medal, the
highest honor of the American Society for Engineering Education; the
George Westinghouse Award from the same organization; the Education
Medal of the Institute of Electrical and Electronics Engineers; and the
Halliburton Engineering Education Leadership Award of the College of
Engineering at the University of Illinois."

Mac's advisor was Oswald
Garrison Villard, jr. (1917-2004; (Obit 1 and 2) Professor at Stanford University.
PhD Stanford University EE 1949 (joined the faculty at Stanford in
1946!) (more details.)

Oswald's advisor was Frederick
E. Terman (1900-1982).
Professor at Stanford University (from 1925). D.Sc. in Electrical
Engineering in June 1924 from MIT. Terman's dissertation was on
``Characteristics and Stability of Transmission Lines.'' Legendary
figure.(Sibling of Claude Shannon.)

Fred's advisor was Vannevar Bush (1890-1974).
Professor at MIT. PhD 1916 jointly
from Harvard and MIT. Wrote "As We May Think", headed the
Manhattan Project, started
the NSF,
and is a pioneer of computer science. He
earned his doctorate in a single
year! You can locate some other advisees of Vannevar Bush on
this page of
genealogies; descendants include Shannon and Huffman.
(Bush's colleague on the Manhattan Project was Robert
Oppenheimer).

Vannevar's advisor was Arthur Edwin Kennelly (1861-1939)Bio-2
Bio-3. Professor at Harvard and then
MIT in EE from 1906. Biography.com
has this to say: "Born in Bombay, raised in England, he left school at
age 13 and taught himself physics while working as a telegrapher. He
emigrated to the U.S.A. in 1887 to become Edison's [chief] electrical
researcher [and mathematician]... He deduced the existence of an
atmospheric ionized reflecting layer, the Kennelly-Heaviside layer."
Several other accounts exist.
Here is a letter
written by Kennelly. The last school he attended
was the University
School London, a boy's school that still exists.
Our
god-father advisor!
Kennelly had no graduate advisor, so our search ends; but I agree with
Brian that we should count Thomas
A. Edison as Kennelly's mentor. Kennelly is reported
as saying, "The privilege which I had being with this great man for six
years was the greatest inspiration of my life." As Edison was also
self-taught, attending school for a total of three months of his entire
life, our search defintely stops there!