This is highly speculative perhaps,but I found the following Family in the 1881 Census in Derby;
Hannah Hollis,Widow Head born Nottinghamshire c 1845.
Fredk Hollis,Son born Derbyshire c1873,
William Hollis,Son born Derbyshire c 1876,
Fanny Hollis, Daughter born Derbyshire c 1878,
I also found the marriage of a Fredrick Hollis and a Hannah Bowler,in Derby in 1866.There is also a Hannah Bowler in Derby in the 1861 Census born in Nottinghamshire in c 1846.I was unable to find a death for a Fredrick Hollis though.
Regards
William Russell Jones
Cefn Mawr
Wrexham.