Slytherin boy who drank a botched potion

This wizard was a student at Hogwarts School of Witchcraft and Wizardry in the 1980s and was sorted into Slytherin. He had Potions class with Jacob's sibling.

Biography
This individual started attending Hogwarts on 1 September 1984 and was sorted into Slytherin.

The individual frequently drank a botched potion in Potions classes, taught by Professor Snape.