Do you have any extra information? Some kind of time frame is necessary really to be able to offer you any help. I have found an Eliza and a Mary living with father Solomon in the 1881 census, but they were both born in Rowley Regis, Staffordshire. There are a few Rosanna/hs with a father named Samuel, born in Dudley, which is pretty close to Netherton, and one recorded as born in Netherton, in 1870, but the father in that case is William, and I have not found an Agar at all so far.
The family of Solomon Danks [engine driver, born in Dudley]living in Rowley Regis in the 1881 census [courtesy of the Mormons' records] includes wife Eliza, son Samuel , born in the USA, daughter-in-law Sarah , son John , daughters Eliza  and Mary  and grandson Roland Worton , all but Samuel born in Rowley Regis.