For one thing, âTrumpâ is not his real name. The Donaldâs grandfather was a German immigrant named Frederick Drumpf who emigrated to the U.S. in 1885 and became a naturalized citizen in 1892. At some point, he started calling himself âFrederick Trump,â but it is unclear if he ever changed his name officially.
incumbent. adj. 1. (often: postpositive and foll by on or upon and an infinitive) morally binding or necessary; obligatory: it is incumbent on me to attend.
In business the term incumbent is used for the largest company in a certain industry, for instance the traditional phone company in telecommunications, typically called the  incumbent operator .or example, in the 2012 United States presidential election, Barack Obama was the incumbent, because he had been the president in the previous term while the election sought to determine the president for the current term.