Cornelius Blockland Sheet Music
- Born: 1530
- Died: 1610
- Birthplace: Utrecht, Netherlands
Cornelius Blockland was a doctor, composer and astrologist, born about 1530 and died about 1610 active in Franche-Comte in the second half of the sixteenth century. He is author of several music publishings and many prognostications published under the pseudonym Himbert Billy.