Olga Erteszek (June 15, 1916 – September 15, 1989) was an undergarment designer and lingerie company owner. She is famous for her nightgowns with full flowing skirt width and generous sweep.
Olga Erteszek along with her husband Jan (1913–1986), a lawyer, came to the United States in 1941. Fleeing Poland and the invading Nazi army, the young couple left their family and most possessions. After emigrating to Russia and then Japan, they both eventually secured a visa and landed in California.
As the daughter of a corsetiere, Olga worked in a sweatshop making girdles and brassieres, and Jan found work in sales. One day she spotted a woman on a trolley with hosiery rolled to her knees. She said to Jan that it was a shame that women didn't have at least some bit of finery to hold up their stockings, something to make them feel feminine no matter how severe the sacrifices or how limited their funds were during the war effort. Jan encouraged her to create something herself to facilitate the woman, so with a $5.00 sewing machine rental and $5.00 of material, she got started.