Robert I, known as Robert the Frisian, was count of Flanders from 1071 until his death in 1093. He was a son of Count Baldwin V out of his first marriage, He was the older brother of Count Baldwin VI

The House of Flanders, also called the Baldwins, was a medieval ruling family of Frankish origin that was founded by Baldwin Iron Arm, son-in-law of Charles the Bald. The House of Flanders was the fir