Fred B. Hadley (born 1914) is a former member of the Ohio House of Representatives, serving from 1967-1978. A long time legislator, Hadley was often involved in legislation regarding education, technology advancement, and labor issues. His district consisted of the direct Northwestern Corner of Ohio.

Fred Koller (born March 5, 1950 in Chicago, Illinois) is an American singer-songwriter. He has been active in the music business since 1973. Fred currently lives and works in Nashville with his wife Trish and their cat Buddy.

Koller has written over 300 songs which have been recorded. He was awarded the BMI Millionaire Performance Award for both Angel Eyes and She Came From Fort Worth. Koller also won BMI Awards for This Dream's On Me, Goin' Gone, Life As We Knew It and Will It Be Love By Morning. He is the former Vice President of The Nashville Songwriters Association International. Koller has taught for Songwriters Guild of America and was a staff instructor for both the Kerrville Folk Festival and the Augusta Heritage Festival.

Koller opened his first bookstore in Capitola, California in 1975. It was located a few blocks from the ocean on Bay Ave. and was called Words and Music. The shop stocked an eclectic collection of used records, books and sheet music. After two years the store moved to an old fisherman's cottage where Fred and his first wife, majolica artist Farraday Newsome, lived upstairs.

John Hadley (16 April 1682 – 14 February 1744) was an English mathematician, inventor of the octant, a precursor to the sextant, around 1730.

He was born in Bloomsbury, London, to Katherine FitzJames and George Hadley.

In 1717 he became a member (and later vice-president) of the Royal Society of London. On 6 June 1734 he married Elizabeth Hodges who herself was wealthy. They had one child, a son John born in 1738.

The octant is used to measure the altitude of the Sun or other celestial objects above the horizon at sea. A mobile arm carrying a mirror and pivoting on a graduated arc provides a reflected image of the celestial body overlapping the image of the horizon, which is observed directly. If the position of the object on the sky and the time of the observation are known, it is easy for the user to calculate his own latitude. The octant proved extremely valuable for navigation and displaced the use of other instruments such as the Davis quadrant.

An American, Thomas Godfrey, independently invented the octant at approximately the same time.

Hadley J. Castille (March 3, 1933 – ) is a prominent Cajun fiddler.

Castille was born to a Cajun French speaking family. His father was named François Castille. He learned to play the fiddle from his Uncle Cyprien Castille at around the age of 9. After moving around for a while, he ended up in Pecaniere - a small community near Leonville, LA. Here, he first heard "Jole Blon" by Harry Choates during a trip to the The Silver Slipper, a grocery store and bar. The song inspired him to take up a new style of playing. In the early 1950s, he started playing at Roy's Bar in Port Barre, LA and local house parties. Also, they played on the KSLO "Amateur Hour" segments on Saturday mornings. After graduating, Castille moved to New Orleans to play in a country band. However, after four to five months he moved back to Leonville, and eventually enlisted in the US Army. The Korean War ended soon after arriving in Fort Hood, Texas. He spent his entire service in Killeen, Texas, where he played in an on base band. After service, he backed off from music to focus on family and his plumbing business.