John Bennett Fenn (June 15, 1917 – December 10, 2010) was an American research professor of analytical chemistry who was awarded a share of the Nobel Prize in Chemistry in 2002. Fenn shared half of the award with Koichi Tanaka for their work in mass spectrometry. The other half of the 2002 award went to Kurt Wüthrich. Fenn's contributions specifically related to the development of electrospray ionization, now a commonly used technique for large molecules and routine liquid chromatography-tandem mass spectrometry. Early in his career, Fenn did research in the field of jet propulsion at Project SQUID, and focused on molecular beam studies. Fenn finished his career with more than 100 publications, including one book.

Fenn was born in New York City, and moved to Kentucky with his family during the Great Depression. Fenn did his undergraduate work at Berea College, and received his Ph. D. from Yale. He worked in industry at Monsanto and at private research labs before moving to academic posts including Yale and Virginia Commonwealth University.

Fenn typically appears as a surname. Occasionally it appears as a middle name, pen name or name of a fictional character.

In the case of the character Fenn Shysa (Star Wars universe), 'Fenn' is used as a given name.

The name Fenn is also used by Wilbur Smith to name one of his characters in his book The Quest (novel). In the book he indicates that the name Fenn means Moon Fish

Fenn has been used as a middle name in cases not directly attributable to retention of a maiden name, such as in the case of the English-Australian solder Anthony Fenn Kemp (1773–1868).

Fenn has occasionally been used as a pen name, such as in the case of American writer Charles L. Grant (1942–2006) who wrote under the name "Lionel Fenn" among others.

John Bennett may refer to:

Koichi Tanaka (田中 耕一, Tanaka Kōichi^?, born August 3, 1959) is a Japanese scientist who shared the Nobel Prize in Chemistry in 2002 for developing a novel method for mass spectrometric analyses of biological macromolecules with John Bennett Fenn and Kurt Wuthrich (the latter for work in NMR spectroscopy).

Tanaka was born and raised in Toyama, Japan. He attended Toyama Chubu High School in Toyama City. In 1983, he graduated from Tohoku University with a bachelor's degree in engineering. As of 2008, he is the only person without a post-bachelor's degree to have won a Nobel Prize in a scientific field. After graduation, he joined Shimadzu Corporation, where he engaged in the development of mass spectrometers.

For mass spectrometry analyses of a macromolecule, such as a protein, the analyte must be ionized and vaporized by laser irradiation. The problem is that the direct irradiation of an intense laser pulse on a macromolecule causes cleavage of the analyte into tiny fragments and the loss of its structure. In February 1985, Tanaka found that by using a mixture of ultra fine metal powder in glycerol as a matrix, an analyte can be ionized without losing its structure. His work was filed as a patent application in 1985, and after the patent application was made public reported at the Annual Conference of the Mass Spectrometry Society of Japan held in Kyoto, in May 1987 and became known as soft laser desorption (SLD).

William Richards Bennett, PC, OBC (born August 18, 1932), commonly known as Bill Bennett, was the 27th Premier of the Canadian province of British Columbia 1975–1986. He is a son of the former Premier, W. A. C. Bennett. He was a 3rd cousin, twice removed, of R.B. Bennett, eleventh Prime Minister of Canada.

Following his father's resignation, Bill Bennett was elected on September 7, 1973, as the British Columbia Social Credit League Member of the British Columbia Legislative Assembly for South Okanagan.

To distinguish him from his famous father, also named William - though usually called "W.A.C." in the media or "Ceece" by his friends^{[citation needed]} - he was usually called simply Bill Bennett. One media term coined to describe the younger Bennett was "Mini-Wac,"^{[citation needed]} derived from another of his father's nicknames, one created by his enemies but ultimately embraced by some supporters - "Wacky".

He was elected the leader of the Socred Party in November 1973, at a convention in Whistler, British Columbia. This same convention also altered the name of the party to the British Columbia Social Credit Party. Bennett set about establishing a political organization modeled closely on Bill Davis's Ontario "Big Blue Machine." Bennett's organization was called the "Baby Blue Machine." He embraced a new coalition of Liberals, social conservatives, and the corporate sector, rather that appealing to the populist base as his father had done.