I’ll have to research that one, I’m not sure off the top of my head.
I was thinking Hoover/Curtis. Hoover was born in West Branch, IA, which could well have been in the IA-02 that passed from Republican Dickinson Letts to Democrat Bernhard Jacobsen in 1930. However, Charles Curtis was born in Topeka, Kansas (a year before it became a state, actually), and while three Kansas Republicans lost their House seats in 1932, none did in 1930.