Why is it called the District of Columbia?

https://www.youtube.com/watch?v=AvciwssJ5nw

In the words of Abraham Lincoln: “If the Protestants of the North and the South could learn what the priests, nuns, and monks, who daily land on our shores, under the pretext of preaching their religion, were doing in our schools and hospitals, as emissaries of the Pope and the other despots of Europe, to undermine our institutions and alienate the hearts of our people from our Constitution and our laws, and prepare a reign of anarchy here, as they have done in Ireland, Mexico, Spain, and wherever there are people that wish to be free, they would unite in taking power out of their hands”. “The Jesuits never forsake.” (Washington in the lap of Rome, Justin D. Fulton; Fifty Years in the Church of Rome, by: Charles Chiniquy LCCN: BX1770.F9).