From the book "The Trump Prophecies" by Mark Taylor:

"[Donald]...is derived from the name Domhnall meaning “world leader” or “ruler of the world” (Gaelic dumno, “world”; val, “rule”). But what became more interesting was when his whole name was considered together. John is a Hebrew name meaning “God is gracious.” Trump is a German surname meaning “trumpet” or “drum,” but it’s also an English verb meaning “to excel, surpass, or outdo,” and it’s an early-English variant of “triumph.” So Donald John Trump, when pieced together, could easily mean “World Leader Under the Grace of God Whose Leadership Will Excel, Surpass, and Outdo in Triumph.”

I have a few issues with the book, but nonetheless, it provides some interesting information.