Please answer a question about the following article about Friedrich Hayek:

His father's career as a university professor influenced Friedrich's goals later in life. Both of his grandfathers, who lived long enough for Friedrich to know them, were scholars. Franz von Juraschek was a leading economist in Austria-Hungary and a close friend of Eugen Böhm von Bawerk, one of the founders of the Austrian School of Economics. Von Juraschek was a statistician and was later employed by the Austrian government. Friedrich's paternal grandfather, Gustav Edler von Hayek, taught natural sciences at the Imperial Realobergymnasium (secondary school) in Vienna. He wrote systematic works in biology, some of which are relatively well known.

Eugen Bohm was friends with which of Hayek's grandfathers?
Franz von Juraschek