Who was the last Hasmonean ruler, and how did his rule end?

The last ruler of the Hasmonean dynasty was Antigonus (also known as Antigonus Mattathias).12

Following the Parthian invasion of Palestine in 40 BCE, Antigonus was established as king and high priest of Jerusalem with Parthian support. However, his rule was short-lived. He was eventually deposed and executed by the Romans under the authority of Mark Antony. This event marked the final conclusion of the Hasmonean line, as Herod the Great subsequently consolidated Roman-backed control over the region.213