Tibetans form one of the smallest immigrant communities in both the United States and Canada;

The Schwenkfelders were a small, pietistic sect that emigrated from southern Germany and lower Silesia in the Austrian Empire beginning in 1731.

The Quakers, officially members of the Religious Society of Friends, were a pietistic Christian sect founded by George Fox in England in the 1640s.

The Pilgrims and the Puritans were two theologically related Christian groups that developed within the Church of England in the 16th century.

Old Order Mennonites were one of the few immigrant groups to maintain their distinctive identity across more than three or four generations after coming to North America.

The Hutterian Brethren (Hutterites) are a communal Anabaptist Protestant sect that emigrated en masse from Russia to the United States in the 1870s.

French citizens who embraced the Protestant teachings of the 16th-century reformation were known as Huguenots.

As bishop (1838–50) and archbishop of New York (1850–64), John Hughes was among the most influential figures in what Roger Daniels calls the “Hibernization of the American Roman Catholic Church.”

The Amish are one of the few immigrant peoples to maintain their distinctive identity over more than three or four generations after migration to North America.

Samuel P. Aheong became one of the most influential Christian missionaries in Hawaii, encouraging the local Christian community to embrace newly arriving Chinese immigrants.