Pedro Pascal was born into the
Balmaceda family from his father side, a rich aristocratic family that has been involved with the politics of Chile since nearly their independence from Spain. Why Pedro calls himself Pascal instead of Balmaceda I don't know, maybe he's trying to hide his family or origin.
His ancestor was
the 10th president of Chile (who died from an allege suicide), and I believe he was named after this
man who might have also been his ancestor.
His mom was the niece of 28th President of Chile Salvador Allende (who also died from an allege suicide when he was ovethrown by Mi General Augusto Pinochet), when the Pinochet coup happened his family had to flee Chile otherwise there could have been a universe where Pedro Pascal's parents were given a free one way helicopter trip before he was even born.