These were endogamous subgroups (i.e., groupings in which
marriages happened exclusively between members of the same group).
The group's hereditary occupation, over which each group
held a monopoly, organized (and determined) the social standing of these jatis.
The Thakurs were a jati regarded to be kshatriyas in
northern India, who have historically served as landowners and village
authorities.
Rabindranath Tagore, the Nobel Laureate, was its most
renowned member.