Robert Montgomery Tubb Jr. was born to Kathryn “Kitty” Marbaker and Robert Tubb on May 16, 1906 in Crown King, Arizona. The family lived in Ash Meadows, Nevada and operated a general store and other shops at Death Valley Junction. His parents divorced, both remained in the area. He married Lorraine Joyce McHenry in 1932 in Los Angeles, California. Tubb later returned to Nevada and lived in Ash Meadows. He died on August 30, 1980.