Nan Wood Graham and Dr. Byron McKeeby were the models for American Gothic by Grant Wood - Cedar Rapids Public Library, Iowa - September 1942. [+]
In the painting they are supposed to be father and daughter but Nan is the painter's sister. Byron was Grant Wood's dentist. I can't find anything that says he resented posing for the painting. They had never met until the posted photo was taken which was 12 years after American Gothic was painted in 1930. Wood painted the house, his sister, and his dentist in separate sessions.