"Cors" (mutated to Gors) is Welsh for "marsh" or "bog", and "goch" is the mutated form of "coch" meaning "red": so the name literally translated means "Red Bog".
"Cors" (mutated to Gors) represents "marsh" or "bog" in Welsh, and "goch" stands for the mutated form of "coch," meaning "red": hence, the name translates literally as "Red Bog."