Hi Laura,
Welcome to RootsChat

This could be Frederick's family on the 1881 -
Jonathan Wills 28 b. Farlam, Cumberland Miner
Jane Wills 26 b. Stapleton, Cumberland
Mary Elizb. Wills 3 b. Denton Nr, Cumberland
Margaret J. Wills 1 b.Denton Nr, Cumberland
Living at Highfield, Brampton
There is a death of a Jane Wills in 1888, Brampton, Vol 10b Page 274
So that could account for Frederick being with his uncles in 1891
Was Jane's maiden name Moses?
JJ