Alonzo Hawk is a notorious but dishonest businessman who appeared in many Disney films.
Credited as Alonzo P. Hawk, he's the main antagonist of the movie. He goes as a banker.
In this sequel to The Absent-Minded Professor, Hawk is once more trying to steal Flubber.
Here, he's also the main antagonist where he goes as a ruthless billionaire who makes a living destroying old buildings (some contains great history) to plan on building skyscrapers and shopping malls. He was going to destroy the Steinmetz Firehouse, home of Mrs. Steinmetz, the aunt of Tennessee Steinmetz, the mechanic of Herbie in The Love Bug, but got foiled by Herbie and many of his friends, including other Volkswagens. In this incarnation, he's renamed Alonzo A. Hawk, probably by mistake.
List of Hawk-inspired characters in other productions
In the 1976 The Shaggy D.A., sequel to 1959 The Shaggy Dog, Keenan Wynn portrays another ruthless billionnaire character, named John Slade, which is a lookalike of Hawk in both behavior and look. It remains unknown why Disney didn't simply reuse the name of Alonzo Hawk, as the name is the only difference between Slade and Hawk.
Other Hawk-inspired characters in Disney movies
Wikipedia also lists two other characters who aren't exactly Alonzo Hawk but seem to have been somehow inspired by him; the first being Martin Ridgeway from 1972 Snowball Express, another bad banker played by Keenan Wynn, but less dishonest than Hawk; and the second (and the only animated one) being J. J. Wagstaff from Fluppy Dogs.
|The Absent-Minded Professor|
Characters: Ned Brainard | Charlie | Betsy Carlisle | Alonzo Hawk | Biff Hawk | Rufus Daggett | Shelby Ashton | General Singer | Mrs. Chatsworth | Coach Elkins | Lenny | Officer Kelley | Officer Hanson | Reverend Bosworth | General Hotchkiss | Admiral Olmstead | Sam Wheeler | A.J. Allen | Judge Murdock | Mr. Hurley | Mr. Hummel | Mr. Harker | Desiree de la Roche | Coach Wilson | Mr. Barley | Mr. Osborne | Edna Daggett | Rex Williams | Humphrey Hacker
Locations: Medfield College
Objects: Flubber | Model T
Songs: Medfield Fight Song | The Flubber Song