That should help
http://www.chm.davidson.edu/vce/GasLaws/CharlesLaw.html
I would guess that the first careful measurements that are ever referenced were performed by Jacques Charles. In 1787 he did an experiment where he filled 5 balloons with with equal volumes of oxygen, hydrogen, nitrogen, carbon dioxide, and air and he heated them all to 80oC. He noticed that all five balloons increased in volume by the exact same amount, but never published his results. Charles' law (which describes the relationship between the volume of a gas and its temperature) was actually developed by Guy-Lussac, but named after Charles because of this initial unpublished experiment. It could also be Boyle.
Jacques Charles (1746-1823), along with the brothers Anne-Jean Robert (1758-1820), and Marie-Noël Robert (1760-1820), launched the first unmanned hydrogen balloon in August, 1783. On December 1, Charles and the younger Robert made the first manned hydrogen balloon flight over Paris, covering some 36 kilometers (22 miles).
Robert Charles died in 1900.
Charles-Robert Ageron was born in 1923.
Charles-Robert Ageron died in 2008.
Charles Robert Leslie was born in 1794.
Charles Robert Leslie died in 1859.
Charles Robert Colvile was born in 1815.
Charles Robert Colvile died in 1886.
Charles Robert Petrie was born in 1882.
Charles Robert Petrie died in 1958.
Robert Charles Bell was born in 1917.