Trivial Trivia - taking trivia to new levels

[L Verge]

I know that Willie Lincoln was named after Mrs. Lincoln's brother-in-law, Dr. William Wallace, but did the doctor come to D.C. with the family? If you can prove that he did in 1861, that may definitely change the answer.

Ironically, the doctor that I am referring to died one month before Willie; and Dr. Stone was then chosen as the family physician.