[1] As an English surname, Tak is a historical spelling of Tagg, which originated in a variety of ways, including as a diminutive of various Germanic names starting with Dag- (e.g. Dagobert), and as a nickname possibly from Middle English tagge "tatter" (referring to a person wearing tattered clothes) or from Old French tache "belt buckle".
The major bon-gwan (clan hometown) for people with this surname is Gwangsan, Gwangju.
[3] Bearers of this surname usually but not always choose to spell it as Tak in the Latin alphabet.
In a study by the National Institute of the Korean Language based on year 2007 application data for South Korean passports, it was found that 73.6% of people with that surname spelled it in Latin letters as Tak in their passports.
In both censuses, more than eight-tenths of bearers of the surname identified as Asian, and about one-tenth as non-Hispanic white.