Doña Juanita (diminutive of Juana) is a name used for the average Chilean, and specially the older women from the countryside (in the manner of Britishman John Bull). A typical usage is: "How would you explain that to Doña Juanita?" (¿Cómo le diría eso a doña Juanita?). An example of the name used in this generic way can be seen in the title of this paper from the Centro de Economía Aplicada, Universidad de Chile: Estimando la demanda residencial por electricidad en Chile: a doña Juanita le importa el precio (Calculating the residential demand for electricity in Chile: Mrs. Jones does care about the price)
President Ricardo Lagos used the name during his May 21 speech in 2004.
References
Doña Juanita Wikipedia(Text) CC BY-SA