Cahill, Holger (born Sveinn Kristján Bjarnarson) (1887–1960)

Icelandic-born art authority and author., he became an authority on American art and wrote the seminal American Folk Art (1932). His outstanding leadership of the Federal Art Project 1935–43, including compiling the Index of American Design, helped nurture a generation of American artists. He wrote fiction in his later years.

He was born in Snaefellsnessysla, Iceland A childhood emigrant to Canada, he moved to New York City in his teens, determined to become a writer. He studied at New York University, Columbia University, and the New School for Social Research. He worked at the Newark Art Museum 1922–31.