Sat Nam! (Literally "Truth Name"--a Sikh greeting)

Not black and not from the South, but I am from the era.

Common black churches would have been AME Zion (African Methodist Episcopal) and Black Southern Baptist (but it would have had another name then). There were Pentacostals too.

I think she'd have called them Reverend, yes.

I would suggest you read I Know Why the Caged Bird Sings by Maya Angelou, which gives a good look at Southern, churching going black culture.

Blessings,

Siri Kirpal