Question: Leopold I, was Holy Roman Emperor, King of Hungary, Croatia, and Bohemia, he's the second son of which emperor?
Sentence (from "Ferdinand III, Holy Roman Emperor"): Ferdinand III (13 July 1608 – 2 April 1657) was Holy Roman Emperor from 15 February 1637 until his death, as well as King of Hungary and Croatia, King of Bohemia and Archduke of Austria.
Relevant evidence: Yes