McGarrett is an uncommon, yet distinctive given name of Irish origin. It's derived from the Irish surname 'Mag A' Ghréagáin', which translates to 'son of Grace'. This name has gained some popularity in recent years due to its use in popular culture, notably as the last name of a main character in the television series "Hawaii Five-0". However, as a given first name, McGarrett remains quite rare.
The name McGarrett has had a consistent but not extremely popular presence in recent decades, with births occurring annually from 1970 to 1973.