Katherine was the 7th of 11 children of Timothy May and Mary Tobin. I do not have much information about her, other than she married James Hoey Connor on April 18, 1888, at St. Peter's Church, in Omaha, Nebraska and are both married at Holy Sepulchre Cemetery, In Omaha.
At the time of Katherine's death, she lived at 2604 Bristol Street, in Omaha, NE.
She died of a Coronary Thrombosis
I know a bit more about her ancestors though. Her father was Timothy. Timothy was naturalized on September 7th, 1863, in Dewitt, Clinton, Iowa. He listed himself as a native to Upper Canada. He moved to Iowa in 1858.
Per Gertrude May's notes, Timothy may rocked (his wife's) Mary Tobins cradle and at an early age, decided to marry her...never had another sweetheart in fact.
On the 1870 Census in Etna, Hardin Co., Iowa; Timothy was listed as a Saloon Keeper.
Regarding Katherine May's mother, Mary Tobin,
Mary went to live with her sister Ellen when her mother married Mr. Dawson. This was not due to the marriage but because Mary could help with Ellen's large family.
Per letter from James A. May, Grandmother May (Mary Tobin) spoke Gaelic or at least a language she said was Gaelic.
They moved to IA in 1858, per Bill Byers
Mary died at the home of Gertrude May Cooney.
Joseph Kenny's notes has him being born 1840, married about 1856 in Peterborough and died 1917 in Mitchell, Davison Co., S. Dakota and buried? (Fact) in 1917 in Ackley, Iowa
Margaret MORGAN states that she always understood that Mary TOBIN May lived in Mitchell with some of her brothers.
Mary's grandson remembered that Mary used to speak something she called Gaelic when she was angry.
Mary worked as a cook for the railroad after Timothy died.
Census of 1910, South Dakota, Davison, Mitchell Township, #134, p 3/23 has age 70, widow, living with D. J. COONEY family, b. Canada, both parents b. Ireland, able to read and write.