IL Marriage Database has in Peoria County, Herman T. QUAST, 16 Nov. 1866, Elizabeth KNOBLAUCH.
They must have been somewhere in Illinois in 1870, but I cannot locate them.
This is not may family, but I'm trying to identify the parents of two QUASETS of Metamora, Woodford, IL, 1880. [ I cannot find the surname QUASET anywhere, so I think it might have been QUAST. ]
Anna E. QUASET, 11, & Otilie QUASET, 7, were in the household with KUNKEL, Andrew, 39; Elisabetha, 32; Bross, 12; Rosina, 10; & Adam H., 1.
Andrew was of Woodford Co., 1860; of Marshall in 1870, with wf. Christina & ch. Prosper & Rosie; then moved back to Woodford by 1880.
In 1900, Otilda, no surname, was called stepdaughter of Andrew KUNKLE (different spelling), Platte Co., NE.Elizabeth had borne six children, only four living, so there might be QUAST or KUNKEL children buried in Illinois with a male QUAS[E]T who died 1853+, leaving widow Elizabeth and two daughters.