Final answer:
The Emperor of the Roman people and father of Pippin III is Charlemagne. He was crowned as the Emperor in 800 CE and was a key figure in uniting western Europe. Augustus, on the other hand, was the first Emperor of the ancient Roman Empire and not related to Charlemagne.
Step-by-step explanation:
The Emperor of the Roman people and the father of Pippin III is Charlemagne. Charlemagne, also known as Charles the Great, was crowned Emperor of the Romans by Pope Leo III on Christmas Day in the year 800. His reign marked a significant period in European history as he united much of western Europe for the first time since the Roman Empire. Charlemagne was a towering figure, both physically and in terms of his impact on the Medieval period, known for his military campaigns, governmental reorganization, and efforts to revive learning and reform the Church.
Contrastingly, Augustus was the first Emperor of the ancient Roman Empire, a title he held from 27 BCE until 14 CE. Augustus, also known as Octavian, was Julius Caesar's adopted son and rose to power after Caesar's assassination. As a skilled political strategist, Augustus established a new governmental structure that would last for centuries and expanded the Empire significantly. He was not related to Charlemagne and did not play a direct role in the formation of the Carolingian Dynasty to which Charlemagne belonged.