Final answer:
The Death Eaters who received Dark Marks on their forearms were Bellatrix Lestrange, Lucius Malfoy, and Severus Snape.
Step-by-step explanation:
The Death Eaters who received Dark Marks on their forearms were Bellatrix Lestrange, Lucius Malfoy, and Severus Snape. These marks are a sign of their loyalty to Lord Voldemort and serve as a way for Voldemort to summon them and communicate with them. For example, in the Harry Potter series, Bellatrix Lestrange proudly displays her Dark Mark as a symbol of her allegiance to Voldemort.