Frederick Trump, grandfather of reality show host and presidential candidate Donald Trump, emigrated the US from Germany in 1885 at the age of 16.   Soon after his arrival in Seattle in 1891, he purchased a restaurant, which also offered “private rooms for ladies,” located in Seattle’s red-light district.  He operated the Dairy Restaurant until 1893, when he moved to Monte Cristo to build a hotel catering to gold and silver prospectors.  With the start of the Yukon Gold Rush in 1897, Trump returned to Seattle and opened another restaurant, this time outside the red-light district.  He sold the restaurant and his other local properties and left Seattle for the Yukon the following year.  He never returned to Washington State.
Donald Trump's grandfather, Frederick Trump, emigrated from Germany to the United States in 1885. He was 16 years old. By 1891, Frederick Trump was in Seattle, where, according to the Puget Sound Regional Archives, "he purchased a restaurant, which also offered 'private rooms for ladies,' located in Seattle’s red-light district." It was called the Dairy Restaurant and was located at 208 Washington Street—present day site of a red brick wall. Puget Sound Regional Archives

Turns out that if you follow Donald Trumps patrilineal line back far enough, you end up in Seattle in the late 1800s.

Frederick Trump, who Americanized his first name from the original Friedrich, was a teenage barber from a poor family when he arrived on New York's Lower East Side in 1885. He headed west after the Great Seattle Fire of 1889.

Setting up shop in Seattle's Pioneer Square area, he expanded from a barber shop to serving meals, liquor, “and since this was Seattle's red light neighborhood, female companionship,” [local historian David] Cameron wrote.

After Seattle, Frederick Trump went on to Monte Cristo, east of Everett, where people were prospecting for gold and silver. In Monte Cristo, Frederick opened a real estate office and a "wrong side of the tracks" hotel. He also ran for Justice of the Peace and was elected in a landslide. (The vote was 32 to 5.)

When the Klondike Gold Rush hit, Frederick headed north and "got rich in the Yukon with hotels known for 'female companionship.'"

The rest is history.