The obituary for Augusta (née Lorenz) Schwert (deceased June 2, 1912) makes reference to Katherine as "Mrs. L. Weigand." Katherine's husband was Leo A. Weigand, who according to his World War I draft registration card, resided with his wife and children at 48 Locust Street in Buffalo. Katharine's baptismal record includes the notation that she and Leo were married at Saint Nicholas R.C. Church on May 15, 1912.

Leo was born on July 10, 1891, in Buffalo, and at the time of his draft registration he was employed by the Pierce Arrow Company. The 1920 U.S. Census shows "Katheryn R. " and Leo A. Weigand still residing at 48 Locust Street, along with their two children Katheryn J. and Leo A., Jr.

The obituary for Katherine's father (deceased January 8, 1938) makes reference to Katherine as "Mrs. George Riffel." Tracing this back to the 1930 U.S. Census, we find that "Katherine" had by then been divorced from Leo Weigand. The 1930 U.S. Census instead shows that she resided with her two children at 25 Ruspin Avenue in Buffalo, with "George F. Riffel" (age 38) as a "boarder." According to his World War I draft registration record, George Fred Riffel was born on February 9, 1892, in Buffalo. The 1920 U.S. Census shows George married to a "Jessie."

After his marriage to Katherine, George apparently adopted her two children, as they both carried the surname "Riffel."

George died on May 29, 1954. "Kathryn" died in Batavia, NY, on March 13, 1985. Both are interred in Lot 314, Section I, Mount Calvary Cemetery (Pine Hill), Cheektowaga, New York.