According to "The Gurnee-Gurnea Family of New York and New Jersey", Harmonius Gurnee was b. 1770/1780, Md. Jamina Seymour, b. 17980/1780, dau of Lyman Wheeler Seymour and Hannah Wilbur. The had 5 children: Samuel B., b. 1815, d. 12 Dec 1868, m. Maria ___., b., 1815, d. 7 June 1843. Frances, b. 1822, m. James A. Bogardus, b. 1825. Lyman, b. 1825. Caleb, b. 1827, m. Mary J. ____, b. 1829. Son, b. 1830.
I copied the entire book when I was at the LDS Family History Library. You can probably order it on microfilm through a local Family History Center. There aren't any sources for this information, though much of the info in the book does have source info.