Hi John.In doing some research on another family, I discovered a Nixon Brewer, born in Nov. 1845 in Virginia, who latere lived in Washington, DC and operated a flour and feed store on 7th Street for many years.
This Nixon was married to Sarah E. (?) and had a daughter in 1875 by the name of Jennie.Jennie married Julian P. Dodge (1869-1957) around 1894.On May 27, 1915, Jennie was killed in an automobile accident near Lisbon, Ohio, while on a trip to the West Coast.
From the newspaper report on the accident (The Washington Post, 5/28/1915), it suggests that Nixon died around 1910-1911.
This may be the Nixon you're looking for.Most of the info I have is from U.S. Census records and the Washington Post article.
Julian Dodge remarried about a year later - a woman 23 years his junior by the name of Blanche Bailey.It is the Bailey family I'm doing research on.
Please contact me at firstname.lastname@example.org if you have additional information.