Charles Tudor Williams (April 13, 1839 – January 7, 1914) was an American businessman, author, composer, linguist, and educator.

Taking a break from the business world, Charles accepted a Professorship teaching Greek at Cleveland Central High School in 1887.

In 1896, he was recruited to manage and serve as the vice president of the Cleveland Box Company, a position that he held until his death.

An expert linguist, Charles spoke fluent French and German, and readily read Greek and Latin.

Also a passionate musician, he composed and performed as an organist under the nom de plume of "Guglielimi", and played the organ and led the choir in the First Congregational Church of Kent, Ohio for 25 years.