Hi there,
Have you lokked at the 1851 census closely because the eldest 2 children are born in Manchester and there is quite a gap .To me it looks like Frances was a widow born in birmingham and they have recently married.In which case a marriage for December 1848 Birmingham 16/575 would fit.
Her maiden name is Levy/Levi and Isaac seems to be lodging with a Levi family in 1841 Smallbrook St Birmingham 1146/7/19/7
David Levi 40 ? y
Rebecca 37 y
Rose 11 y
Leah 9 y
Clara 5
Matilda 3
Isaac davis 27 traveller N
John ward 23 " N
Benjamin Solom 22 watch maker F
Sarah Davis 26 N and 2 female servants.
Could Frances be his second wife too an Sarah his first or perhaps a sister?
Frances and her children are living in the same street in 1841.
Daniel Solloman 60 gen dealer y
Judith 50 y
Elias 25? assistant y
Clara 20 y
Emma 17 y
henry 11 y
Esther Levi 2 y
Edward 2 mths y
Sarah simmons 16 fs y
Frances Levy 25 y
Ciderdrinker
ps altough the age isn't right I think this may be his death in Kings Norton
Issac Davis 58 6c 233 as his son Ezkiel is there in latter census and Frances is a widow in 1871.