Catherine Jakova, born in Pennsylvania on March 14, 1903, was the daughter of Michael Jakova and Barbara Falak, according to her sister's death certificate. The parents were born in Austria.

In the 1930 Federal Census, Catherine Jakova, 26, her sister, Mary, 27, and a boarder, Agness Dyer, 31, all born in Pennsylvania, resided at 4929 Dearborn Street, Pittsburgh. Catherine, Mary, and Agness are all listed as private duty nurses.

Agnes Dyer was the former Agnes Kerr, a graduate of the St. Francis Hospital School of Nursing Class of 1921. She was separated from her husband at the time of the 1930 census.

At the time of the 1940 census, Catherine Jakova, hospital nurse, 32, lived at Millvale Avenue, Pittsburgh, with Mary Jakova, 25, and Elenor Hafik, hospital nurse, 34.

From a list of Pennsylvania Registered Nurses, 1940-1941, published by the Pennsylvania State Board of Nurse Examiners: "Catherine T. Jakovac, 5015 Dearborn St., Pittsburgh."

Catherine Jakova's sister, Mary Elizabeth Jakova, born in Pennsylvania in 1902, died January 12, 1957 at St. Francis Hospital. Mary had worked as a Domestic at the hospital, according to the death record; she was not a nurse. She is buried at Calvary Cemetery, Pittsburgh.

Catherine Jakova, 85, born on March 14, 1903, passed away on January 23, 1989.

OBITUARY: Pittsburgh Post-Gazette, Jan 25, 1989 - JAKOVA, On Monday, Jan. 23, 1989, Catherine Jakova; beloved sister of the late Mary E. Jakova; aunt of Dorothy Huster of Lima, Ohio, and Jack Dyer of Toledo, Ohio. Friends are being received McCabe Bros., Inc., Funeral Home, 5300 Penn Avenue..... Burial in St. Lawrence O'Toole Church.

Although Catherine Jakova is named as the "aunt" of the son and daughter of Agnes Kerr Dyer in her obituary, it does not appear that they were biologically related. But the unmarried Jakova sisters must have had a close relationship with the two children, Dorothy (Dyer) Huster and Jack Dyer.