Clare (later Claire) Mary Groetsch was born on September 3, 1905 to Joseph Groetsch and Barbara Geyer, both born in Pittsburgh.

1920 Census, 13th Ward, Allegheny County, Pa.
7625 Tioga St.
Joseph Groetsch, Head, Owns Home, 43, Auto Business, b Pa., parents b Germany
Barbara, Wife, 40, b Pa., father b Germany, mother b Pa.
John, Son, 17, b Pa.
Clara, Dau, 14, b Pa.
Mary, Dau, 10, b Pa.
Joseph, Son, 7, b Pa.
Louise, Dau, 4, b Pa.

1940 Census, 12th Ward, Pittsburgh, Allegheny County, Pa.
6935 Churchland St.
Clara Geyer, Head, Owns Home, 64, Single, b Pa.
Barbara Groetsch, Sister, 61, Widow, b Pa.
Joseph Groetsch, Nephew, 26, Inerior Decorator, b Pa.
Charles T. Tobin, Nephew, 35, Pharmacist, b Pa.
Claire M. Tobin, Niece, 34, b Pa.
Gretchen Tobin, Gr-niece, 1 month, b Pa.
Jay Tobin, Gr-nephew, 7, b Pa.

From a list of Pennsylvania Registered Nurses, 1940-1941, published by the Pennsylvania State Board of Nurse Examiners: "Clare Groetsch Tobin, 6935 Churchland St., Pittsburgh."

The father died in 1938 and the mother in 1949.

John Groetsch, brother of Clare, became a priest. He died in August 1952, at which time his sister, Mrs. Charles Tobin, lived in St. Petersburg, Florida.

Charles J. Tobin died in 1966, and Claire died on September 19, 1979, both in St. Petersburg, Florida.