1880 Danville, Vermilion, IL
Lorenza Dobbin, b. OH, 38, laborer
Minty J., b. OH, 31
Alice V., b. IL, 13
Charles J., b. OH, 10
William G., b. OH, 8
Luella M., b. IL, 4
William G. Dobbins, b. OH April 1872, married 1894, farmer cornice work; tanner cornice work?
Lena, b. IN Oct 1874, 1/1
Ray, b. IL Feb 1896
William S. Dobbins, b. OH, 36, M1-16yrs, cornice man
Lena, b. IN, 34, 2/1
Ray E., b. IL, 14 but written in left-hand margin "Dead"
William G. Dobbins, b. OH, 46, contractor sheet metal
Lena, b. IN, 43
Louise, b. IL, 8
W. G. Dobbins, b. OH, 57, contractor sheet metal
Lena, b. IN, 54
Louise, b. IL, 18
William Grant Dobbins d. 23 July 1936, Danville, Vermilion, IL
Source: Butler, Goff, Harris family tree, ancestry
I didn't find Lena in a 1940 Census and her daughter Louise had married.
Lena Hastings Dobbins
Born: 1875, Indiana
Died: 15 Feb 1952
Buried: Spring Hill Cemetery
I looked for her parents but didn't find him. A couple of her siblings are listed on FAG and you might have more luck looking for them.
I'd contact the Danville Public Library and Archives, http://danvillepubliclibrary.org/archives.htm
for copies of both of their death certificates and obits. Their parents names will be on their death certs if the Informant knew that info. Successful Searching!