Seems likely but there is no direct link to her being the daugher of Frederick and the sister of Henry.

LIsted in the Pioneers of Osage County as follows:

b 1830 in Ohio
d. 1870-1890 in Benton, Osage, Missouri
spouse: Henry Hemminger


Found obituary in The Advertiser-Courier (1/23/1878, page 5)
died Jan, 16, 1878 of pneumonia, of Morrison, MO at the age of 50 years


Census records for Henry Hemminger indicate the following:


1860 1870 1880
H.K. 37 OH 48 OH 60 OH
Catherine 30 OH 42 OH
Angeline 16 OH
Elizabeth 10 MO 19 MO
Sarah 7 MO
Isabelle 17 MO

Sarah and Isabelle are certainly the same person

Possible timeline for Catherine:
born in OH in 1828
married at age 14 or 15 in Ohio in 1842 or 1843
gives birth to first child Angelina in Ohio in 1844
being married she would not have been in her father’s 1850 census with brothers Frederick and Henry
in fact, based on the birth of her second child Elizabeth in MO in 1850, she and her family went to MO before father and brother

It would help this timeline to see if Henry Hemminger is listed in the Pioneers of Osage County.