Yes, Autumnfair is definitely a goth band because most of their albums belong to the Gothic Rock genre, which is a core subgenre of goth music. Albums like Glaciers And Gods and 1986 - 1989 are examples of their goth sound.
Autumnfair is located in United States, active in 1986 — 1990, 2016 — present. You can find more information about Autumnfair on their GothDB band page.
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