Why did Esav connect the current episode with Ya'akov's name?
Seforno: It was not just a play on words, but, as the Gemara says in Berachos (7b) 'The name is the cause.' 1
Consequently, a person's destiny lies to a certain degree, in his name.
Why did Esav refer to the incident that occurred when the twins were born?
Rashbam: He was complaining that they called him Ya'akov, with reference to that incident, which served to indicate that he was the Bechor and that Ya'akov was therefore destined to receive less than him. And now, not only did he not receive less, but he was blessed with double. 1
See Rashbam for other examples of this format.
What led Esav to believe that Yitzchak had reserved him a Berachah?
Seforno: He accepted that the main Berachah that had been his was lost, but he could not conceive that, when his father blessed him, he left nothing for his brother Ya'akov.