Sounds like somebody got confused. "Tim Giether" has a last name different from "Peter Geither", and "Geither" is not "Geithner".
Is this story a joke?
I don’t know it is?
From Wiki
Dunham then pursued a career in rural development championing women’s work and microcredit for the world’s poor, with Indonesia’s oldest bank, the United States Agency for International Development, the Ford Foundation, Women’s World Banking, and as a consultant in Lahore, Pakistan.
She mingled with leaders from organizations supporting Indonesian human rights, women’s rights, and grass-roots development.[29]
While at the Ford Foundation, Dunham worked with Peter Geithner, father of Tim Geithner (who later became United States Secretary of the Treasury in her son’s administration), to develop the Foundation’s microfinance programs in Indonesia.[38]
http://en.wikipedia.org/wiki/Ann_Dunham