The Book of Dow has Elva Leila Dow b. 10 Jan 1881, d. 24 Apr 1912, m. Allen Hall, and had one child, Beatrice Nathalie b. 17 June 1906. The book lists her parents as Isaiah Dow and Emily Maxwell, Isaiah's 2nd wife. He was previously married to Emily's sister Sarah. Isaiah was the son of Oliver Dow and Elizabeth Milburn.
1850 census Calais, Washington Co., ME has Oliver, wife Elizabeth and the 6 children living at that time - including Isaiah who is listed as 11. The book gives a 3 June 1839 birth date.
The 1910 census for Mile ME has Allan, Leila and daughter Beatrice. N.
The book traces this line back to Henry Dow of Watertown MA in 1637. I don't have any independent information (other than census images) to confirm the ancestry presented in the book. If you would like more detailed information from the book, or census images, please e-mail me directly.