What does Grantham mean?
Grantham \g-ran-tham, gr(a)-ntham\ as a name for boys is of English and Gaelic origin, and the meaning of Grantham is "tall, big". Grantham is a form of Grant (English, Gaelic): a Scottish name. Atypical as a name for boys.
Grantham has 1 related form via Grant: Grantley.
Grantham is an unusual first name for males but a very prominent last name for both adults and children (#2446 out of 88799, Top 3%). (2000 U.S. Census)
Displayed below is a comparison of the popularity of Grantham and related names. The only popular variation form of Grantham (#unlisted) listed in the Top 1000 is Grant (#155 in 2014). This boy name was at the peak of its popularity in 1997 and is now much less popular. (2014 Birth Statistics)