Yesterday I received a question about a Dr. Trudeau who practiced from about 1830-1877 (who, it turned out, we don't have any information about). Out of curiosity and because we have the massive Vorwald Collection that includes tuberculosis research done at the Trudeau Foundation at the Saranac Laboratories in New York, I Googled the name and dates and found this entry on Wikipedia:
[Edward Livingston] Trudeau had two sons, Edward Livingston Trudeau Jr., who died of tuberculosis, and Francis B. Trudeau, who succeeded his father at the sanatorium as director until 1954. Francis B. Trudeau's son, Francis Trudeau, Jr. is the father of cartoonist Garry Trudeau.
Where the coincidence comes in is that we have original art for the April 21 and 22, 2004 Doonesbury comic strips, which of course are done by Garry Trudeau.