If you have information about this name, share it in the comments area below!
Books about Clapeyron:
Applications of the Clapeyron Equation to Water and Ice in Porous Media by Patrick B. Black (1995)
Abhandlung über die bewegende Kraft der Wärme, von E. Clapeyron by Emile Clapeyron (1926)
Wiki information Clapeyron:
The Clausius–Clapeyron relation, named after Rudolf Clausius and Benoît Paul Émile Clapeyron, is a way of characterizing a discontinuous phase transition between two phases of matter of a single constituent. On a pressure–temperature diagram, the...
Benoît Paul Émile Clapeyron was a French engineer and physicist, one of the founders of thermodynamics.