Teresa was the sister of Amelia Mayer, Class of 1909. They were the daughters of George and Mary (Frey) Mayer, both born in Germany.

At the time of the 1900 Federal Census, the Mayer family lived on Brighton Road, Pittsburgh. George was a laborer in a slaughter house. The record indicates that George immigrated in 1889, and his wife and the two children they had at the time, Amelia and Charles, came in 1890. After they arrived in Pennsylvania, they had Louis, Trasey (Teresa), and George by 1900. Teresa was born in June 1894, according to the census.

In 1910, George and Mary lived in Pittsburgh, and George was still working as a laborer in a slaughter house. Their children were Amelia, 23, a trained nurse; Charles, 21, in "priest school"; Louis, 18, a laborer in a slaughter house; Treacie [Teresa), 16, nurse in hospital; George, 14. Teresa didn't graduate from the nursing school until 1914, but evidently worked at the hospital in some capacity.

Amelia and Teresa M. Mayer are also listed in the 1910 census of Tarentum, Allegheny County, at which time Amelia was a hospital superintendent and Teresa a nurse. They had a house and a number of boarders - hospital employees - lived with them.

At the time of the 1920 Federal Census, Teresa M. Mayer, a Trained Nurse - Own Practice, was residing on Friendship Avenue, Pittsburgh. She might be the woman of that name who was employed as a nurse secretary and listed in the 1920 census on the same page as the St. Francis student nurses.

In 1940, she was living on Friendship Avenue and was employed as a stenographer for the University.

She is listed in the 1951 Pittsburgh City Directory as a "stat University of Pittsburgh" and resided at Penn Avenue.

Teresa's date and place of death are unknown (possibly June 1980). Amelia, her sister, is buried at Calvary Cemetery, Toledo, Lucas County, Ohio.