Denomination
/dɪˌnɒmɪˈneɪʃən/
noun
The act of naming or designating.
That by which anything is denominated or styled; an epithet; a name, designation, or title; especially, a general name indicating a class of like individuals
A class, or society of individuals, called by the same name; a sect or religious subgroup.
“She follows the Ahmadiyya denomination of Islam.”