Reginald Aubrey Fessenden (October 6, 1866 – July 22, 1932) was a Canadian-born American electrical engineer and inventor who received hundreds of patents in various fields, most notably ones related to radio and sonar.

U.S. Senator, Treasury Secretary, abolitionist.

Laurence T. Fessenden (born March 23, 1963) is an American actor, producer, writer, director, film editor, and cinematographer.

William Pitt Fessenden (October 16, 1806September 8, 1869) was an American politician from the U.S. state of Maine.