Hectopascal etymology in English

English word hectopascal comes from English pascal, English hecto-

Dictionary entry	Language	Definition
pascal	English (en)	In the International System of Units, the derived unit of pressure and stress; one newton per square metre. Symbol: Pa.
hecto-	English (en)	In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 100. Symbol: h.
hectopascal	English (en)	(metrology) An SI unit of pressure and stress equal to 102 pascals. Symbol: hPa.

Hectopascal etymology