Complex sentence: Starhemberg is the name of an Austrian noble family hailing from Upper Austria, specifically Steyr and, who were Counts of the Empire from 1643, then raised to princes in 1765.
Split into simpler sentences: Starhemberg is the name of an Austrian noble family originating from Upper Austria, specifically Steyr and. They were Counts of the Empire from 1643, then raised to princely rank in 1765.