They were known as Quakers.
Most of them were called abolitionists.
They were called abolitionists.
They were called abolitionists.
I believe they were called 'Abolitionists'.
Dogma.
The name of the reform group that worked to end slavery was the abolitionists. The abolitionist movement had leaders such as Frederick Douglass that worked to help free slaves.
Methodist
Chinese
Quakers
Friends
Another name for a religious group is a denomination.
There names were abolitionists.