Robert Smith Todd
Robert Smith was born before 1805.  He died after 1818.

 Eliza Parker
Eliza was born before 1805.  She died after 1818.

 Mary Ann Todd
Mary Ann was born on December 13th, 1818 in Lexington, Fayette County, Kentucky.  She died at the age of 63 on July 16th, 1882 in Springfield, Sangamon County, Illinois.  She was buried in Oak Ridge Cemetery, Springfield, Sangamon County, Illinois.