Mary Lillian Hay
- Born: 29 Sep 1852, Oneco Townshiip, Stephenson County, Illinois
- Marriage: Charles L. Marshall in 1881
- Died: 21 Jul 1894, Seville, Medina County, Ohio at age 41
- Buried: Mound Hill Cemetery, Seville, Medina County, Ohio
Noted events in her life were:
• Census, 1860, Illinois, Stephenson County, Oneco Township, Orangeville Post Office, Page 349. Age 7 yrs.
• Census, 1870, Illinois, Stephenson County, Freeport Ward 1, Roll 275 Book 1, Page 71a. Age 17 yrs., attended school within the year.
Mary married Charles L. Marshall in 1881. (Charles L. Marshall was born about 1849 in Ohio and died after 21 Dec 1898.)