Jerry O'Day was a post war California artist, also known by the name of Geraldine Naomi Heib. (1912-1986) Married to artist Dave Lemon.

Solo Exhibitions: City of Paris, Rotunda Gallery; Lucien Labaudt Gallery, 1963; Torrance Gallery, San Anselmo, 1955; Marin Art Gallery, Sausalito, 1956; Palace of The Legion of Honor, San Francisco, 1962; East & West Gallery, Fillmore Street, San Francisco; Landmarks Gallery, Marin County, 1991.

Source:

https://www.1stdibs.com/furniture/wall-decorations/paintings/abstract-watercolor-jerry-oday/id-f_11047093/