Meaning & History. Derived from Latin leo lion, a cognate of LEON. It was popular among early Christians and was the name of 13 popes, including Saint Leo the Great who asserted the dominance of the Roman bishops (the popes) over all others in the 5th century.It was also borne by six Byzantine emperors and five Armenian kings.erived from Latin leo lion, a cognate of LEON. It was popular among early Christians and was the name of 13 popes, including Saint Leo the Great who asserted the dominance of the Roman bishops (the popes) over all others in the 5th century. It was also borne by six Byzantine emperors and five Armenian kings.
Combustion: A combustion reaction is when oxygen combines with another compound to form water and carbon dioxide.These reactions are exothermic, meaning they produce heat. An â¦. 4 people found this useful.ombustion: A combustion reaction is when oxygen combines with another compound to form water and carbon dioxide. These reactions are exothermic, meaning they produce heat. An â¦. 4 people found this useful.
A reaction has two components with the reactant as an ingredient,  and the product is the end result. A combustion reaction as the  reactants of O2 (oxygen) and CH4 (metha â¦ ne). Their product through  the reaction CH4 + 2O2 is 2H2 (water) and C02 (carbon dioxide). The substances that are initially present and consumed in a chemical reaction are called reactants and the substance which is formed at the end of the reaction is called â¦ products.. 2 people found this useful.