Clair Cameron Patterson (June 2, 1922 – December 5, 1995) was an American geochemist known for his groundbreaking work in determining the age of the Earth. Born in Mitchellville, Iowa, Patterson graduated from Grinnell College and later obtained his Ph.D. from the University of Chicago. Throughout his career, which was spent entirely at the California Institute of Technology (Caltech), Patterson collaborated with George Tilton to develop the lead–lead dating method, which provided a more accurate calculation of the Earth's age at 4.55 billion years.Patterson's research also led to a significant re-evaluation of the unregulated growth of industrial lead concentrations in the atmosphere and the human body. His activism played a pivotal role in the banning of "leaded gasoline" and "leaded solder" in food cans. In addition to his scientific contributions, Patterson's early life and educational journey, including his marriage to Lorna (Laurie) McCleary, provide insights into his personal and professional development. His meticulous approach to research, including the establishment of one of the first laboratory clean rooms, demonstrates his commitment to ensuring the accuracy and integrity of his work.Overall, Clair Cameron Patterson's legacy as a pioneering geochemist and advocate for environmental health continues to inspire and influence scientific research and public policy.

Clair Engle (1911-1964) was a prominent American politician known for his dedicated service as a United States Senator from California. His notable legacy includes his pivotal role in breaking the filibuster of the Civil Rights Act of 1964, despite being partially paralyzed and unable to speak due to a brain tumor. Engle's early life was marked by his academic achievements and his elopement with his first wife, Hazel, followed by his marriage to Lucretia Caldwell. After being admitted to the California bar in 1933, Engle served as District Attorney of Tehama County and was later elected as a U.S. Representative for California's 2nd congressional district. His dynamic leadership earned him the nickname "flying congressman" due to his use of a pilot's license for campaigning. Engle's contributions as a U.S. Senator include his work on the San Luis water project and civil rights legislation. Despite his health struggles, Engle continued his advocacy until his passing in 1964, leaving a lasting impact on American politics.

Clair Francis Bee, born on March 2, 1896, was a prominent American basketball coach known for his exceptional leadership at Long Island University in Brooklyn, New York. He achieved undefeated seasons in 1936 and 1939, securing two National Invitation Tournament titles in 1939 and 1941. Bee's remarkable coaching career was marked by numerous accomplishments, including a 43-game winning streak from 1935 to 1937. Notably, he holds the Division I NCAA record for the highest winning percentage, triumphing in 83% of the games he coached. Bee's significant influence on the sport is evident through his innovative contributions, such as the 1–3–1 zone defense and the three-second rule. Additionally, he co-hosted the early NBC sports-oriented television program "Campus Hoopla" and authored the Chip Hilton Sports Series for younger readers. His enduring impact is recognized through awards like the Clair Bee Coach of the Year Award and the Chip Hilton Player of the Year Award. Inducted into the Basketball Hall of Fame in 1968, Bee's legacy continues to shape the world of basketball.

Clair Omar Musser (1901–1998) was a multi-talented musician, renowned as a marimba virtuoso, conductor, composer, and designer of keyboard percussion instruments. Born in Pennsylvania, he began studying the xylophone in the 5th grade and later became a recognized virtuoso, performing as a soloist and with orchestras. Musser is noted for his innovative design work, including the Marimba-Celeste, precursor to the drum machine, and the Celestaphone, which merged his interests in outer space and music. He also made significant contributions as a conductor and promoter of large marimba orchestras, leading ensembles of 100 to 300 players. After leaving the Deagan Company, he founded Musser Marimbas, where he worked on refining and standardizing the marimba. Musser also had a notable impact as a teacher, influencing many students during his time at Northwestern University. His compositions, though many have been lost, include piano solos, sacred music, and arrangements for marimba and vibraphone. Musser's enduring legacy lives on through the surviving works he published, such as Etude in Ab, Op.6, No.2, and Prelude, Op.11, No.7, among others.

Clair L. Finch (July 31, 1911 – December 1, 1976) was an accomplished American lawyer and politician known for his service in the Wisconsin State Assembly. Born in Palisade, Colorado, Finch later graduated from Antigo High School in Wisconsin, and went on to earn his bachelor's degree from the University of Wisconsin, followed by a law degree from the University of Wisconsin Law School. A dedicated Republican, he practiced law in Antigo, Wisconsin and served four terms in the Wisconsin State Assembly from 1943 to 1949. Additionally, Finch was a member of the Wisconsin Board of Tax Appeals for over three decades, with an impressive tenure from 1940 to 1974, during which he held the position of chairman. His impact and dedication to public service were felt deeply throughout Wisconsin. Finch passed away in 1976 and was laid to rest in Antigo, Wisconsin. His legacy endures through his contributions to the legal and political landscape of the state.