Clair

Clair Cameron Patterson (1922 – 1995) was an American geochemist. He received his Ph.D. from the University of Chicago and spent his entire professional career at the California Institute of Technology (Caltech).

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In collaboration with George Tilton, Patterson developed the lead–lead dating method from the established procedures for uranium–lead dating. By using lead isotopic data from the Canyon Diablo meteorite, he calculated an age for the Earth of 4.55 billion years, a figure far more accurate than estimates existing at the time, and one that has remained largely unchallenged since 1956.

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Patterson first encountered ubiquitous lead contamination in the late 1940s as a graduate student at the University of Chicago. Later, his work on this subject led to a total (US and worldwide) re-evaluation of the unregulated growth of concentrations of industrial lead in the atmosphere and in the human body. His activism about this problem proved seminal in the banning of "leaded gasoline", as well as "leaded solder" in food cans.

Jean-Clair Todibo is a French professional footballer who plays as a centre-back for Premier League club West Ham United, on loan from Ligue 1 club Nice, and the France national team.

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Todibo made his international debut for France under-20 on 16 November 2018, in a 1–1 friendly draw with Switzerland in Cartagena, Spain.

Clair A. Callan (1920 – 2005) was an American Democratic Party politician. After losing his first race for Nebraska's 1st Congressional District in 1962 to incumbent Ralph Beermann, Callan was narrowly elected to the Eighty-ninth United States Congress in 1964, serving from January 3, 1965, to January 3, 1967.

Clair de Lune xd.

Clair is the name of a Dragon-type Gym Leader in the Pokemon games. In this case, it's a female character.

Lake Saint Clair, the "sixth" of the Great Lakes, is named after St. Clare. Note that in French, however, it has an -e to it (Lac Sainte-Claire).

Clair Huxtable (played by Phylicia Rashād) is the mother on the Cosby Show.