The English language only became standardized in the last few centuries; therefore, spelling variations are common among early Anglo-Saxon names. As the form of the English language changed, even the spelling of literate people's names evolved. Glidden has been recorded under many different variations, including Gledall, Gledhill, Gladhill, Gladhall and others.
First found in Yorkshire near Halifax where they held a family seat as Lords of the manor of Gledhill from very ancient times.