Jancar's mother, who was of Norwegian, Swedish, Danish and Irish Ulster descent, was born in Maskell, Nebraska.
This gallery was located on the top floor of an art deco high-rise building at 3875 Wilshire Blvd, Los Angeles and in 2008 he left this location and moved Jancar Gallery to 961 Chung King Road, Los Angeles.
He hosted exhibitions of established, mid-career and emerging artists from Los Angeles, New York and Europe, many of whom were women.
At Jancar Gallery some of the artists shown include John Baldessari, Robert H. Cumming, Harriet Korman, Derek Boshier, Betty Tompkins, Judy Chicago, Suzanne Lacy, Micol Hebron, Hildegarde Duane, Catherine Lord, Rena Small, Annie Sprinkle, Tricia Avant, Susan Mogul, Richard Newton, Elana Mann, Christian Cummings, Judith Linhares, Katia Santibañez, Martha Alf, Andrea Bowers, Roger Herman, Melissa Meyer, Cyril Kuhn, Dorit Cypis, Hubert Schmalix, Natalia LL, Kathrin Burmester, Martha Wilson, Stacy Kranitz, Angela Ellsworth, Jasmine Little, Bobbie Oliver, LeRoy Stevens, Doug Harvey (artist) and Ilene Segalove.
The Jancar Gallery records are held in the Smithsonian Institution's Archives of American Art.