The story
From a Norman surname, from a place in Normandy (Old French for "Gomeric's hill"). Gumaric was a Germanic personal name composed of *gumô (“man”) and *rīks (“ruler”) (whence the modern French surnames Gomery, Gommery and Gumery or the Galician placename Gomariz).
Etymology from Wiktionary, CC BY-SA 4.0.