The name Greathel is of Anglo-Saxon origin, derived from the Old English elements 'græg' meaning gray, and 'hel' signifying helmet or head protection. It was likely used as a nickname for someone with gray hair or a gray helmet. In medieval times, it was also occasionally used as an occupational name for a helmsman, one who steers a ship. The name Greathel is quite rare today, but it has been recorded in various forms throughout history. It shares its roots with similar names like Grathel and Graithil.
"The name Greathel was quite popular in 1927 and 1930, with five births recorded each year."