Hermit.
The Cistercians or Trappists are quite strict in their dedication to the cloistered monastic lifestyle.
It wasn't needed
Elizabeth was a strict protestant. She allowed some religious freedom but not much.
fundamentalism
by being strict and moral, and sober and religious.
Their Religious Rule Was Too Strict.
They had many gods and could choose one to worship.
Puritans were strongly religious and strict. Quakers also lived there.
While bearing in mind that 'strict' is very much a relative term, and without overlooking the great variety of Muslim sects and practices, it can reasonably be said that, from the ordinary Western perspective, Muslims are 'strict' in respect to their moral values, their religious devotion, and their general comportment. The reason for this 'strictness' is cultural and religious alike, as the traditional home-cultures and religious authorities for Muslim practice and belief are far more traditional (or, conservative) and thus 'strict' than what generally can be found throughout the West in the 21st century.
no that is not a religious name
probably because of some strict contemporary religious rules. Refer to the religious opposition to the early renaissance