What's in a name--trump--from wiki.

Kallstadt, in Germany, the Trump family's ancestral home. Trump is a German surname derived from either the word for "drum" or for "trumpet".[3] The name is on record in Kallstadt from the 17th century.[4] Gwenda Blair in her book The Trumps (2000) suggests the family may be descended from an itinerant lawyer, Hanns Drumpf, who settled in Kallstadt in 1608 and whose descendants changed their name from Drumpf to Trump during the Thirty Years' War of the 1600s.[5][6][7] However, this is not in accordance with data provided by German genealogists.[4] Journalist Kate Connolly, visiting Kallstadt, found several variations in spelling of the surname in the village archives (including Drumb, Tromb, Tromp, Trum, Trumpff, Dromb) but her article does not note "Drumpf".[8] There are no indications that other spellings of the name, including Trumpf, could be related to the Trumps.[9]