About a month ago, I bought Geen a book by one of Georgia O'Keeffe's neighbors. It's called The Genízaro and the Artist, and the author is Napoleón Garcia with help from Analinda Dunn.
I haven't heard a lot about genízaros, but I've heard some. Last fall, before I was going to teach an introductory course in Chicano Hispano Mexicano Studies, I read a lot about New Mexican history. In those readings is where I encountered the term genízaro. I did not find one clear definition, but for those unfamiliar with it, here is my patched together definition from memory: Native person, often from a Pueblo, who worked for Hispano families and often lived with them. In some cases, these Natives had been sold into servitude--slavery in form though not name--by other Natives (non-Pueblos, including Apaches, Comanches, and Utes) or Spaniards. The genízaros didn't remain connected to other Natives. Also, there was mixing between these Natives and Hispanos. I don't have a handy list of sources, but Nuevo México Profundo: Rituals of an Indo-Hispano Homeland has an essay by Enrique Lamadrid that discusses this term.
We stayed long enough to take some fotos. Here's one of them.