The first Apache Baha'i declared between 1950 and 1957. We don't have a name yet, but it is probably Lyman and Rosie Curtis - Yavapai-Apache Nation, Camp Verde, Arizona. They lived very close to the Gimlin Ranch where many Baha'i events were held and many Native Baha'is visited.
There is also our beloved Meredith Magoosh Begay - Mescalero Apache. There's much more to be said about her and I will add as much as I can as soon as possible. There is also You Tube video about her and her experience as a Baha'i.