Elizabeth was born in 1809. She passed away before 1880.
Sources
"Maryland, U.S., Compiled Marriages, 1655-1850" database with images. Ancestry. (www.ancestry.com : Accessed 20 January 2021) Samuel Kennard and Elizabeth Willis married 18 June 1838 in Kent County, Maryland; Citing "Dodd, Jordan, Liahona Research, comp.. Maryland Marriages, 1655-1850."
"1850 United States Federal Census" database with images. Ancestry. (www.ancestry.com : Accessed 20 January 2021) entry for Elizabeth Kenard household; Census Place: District 3, Kent, Maryland; Roll: 294; Page: 290a; Citing "Seventh Census of the United States, 1850; Records of the Bureau of the Census, Record Group 29; National Archives, Washington, D.C."
"1860 United States Federal Census" database with images. Ancestry. (www.ancestry.com : Accessed 20 January 2021) entry for Elizabeth Kennard household; Census Place: District 3, Kent, Maryland; Page: 991; Family History Library Film: 803477; Citing "1860 U.S. census, population schedule. Washington, D.C.: National Archives and Records Administration, n.d."
"1870 United States Federal Census" database with images. Ancestry. (www.ancestry.com : Accessed 20 January 2021) entry for Elizabeth Kennard in Cornelius J Scott household; Census Place: Galena, Kent, Maryland; Roll: M593_590; Page: 46A; Family History Library Film: 552089; Citing "1870 U.S. census, population schedules. Washington, D.C.: National Archives and Records Administration, n.d."