Are there any examples of two different prophets who have the same name?
The Talmud [Megillah 14a] says that the number of prophets in Israel was twice the number of Israelites who left Egypt. If you count only the men, that's 1.2 million. If you count everybody that's 6-8 million.
There aren't that many Jewish names. Therefore, it is overwhelmingly likely that at least two prophets had the same name.
(The Talmud adds that Tanach recorded only the prophecies of 48 prophets and 7 prophetesses, because only these prophecies had value for future generations. The other prophecies are not pertinent to us. For a list of these 55, see here. No two have the same name.)