FordLover on Family Tree Circles

Looking for family of Thomas Johnson born 1864 in Bradford Yorkshire died in Australia 1900 Mother Anne Myers born Plymouth, Devon- Father Thomas Johnson born C 1823 possible in Keighley, Yorkshire and died 1863 in Bradford York. Anne remarried John NEWTON & young Thomas adopted his step father's name. 1871 census has Ann John & young Thomas
Newton living in Hertfordshire

Thomas (Junior) had three siblings
Mary Ann born C 1850 died 1863
Charles born C 1857 died 1863
Ada born C 1860

Looking for parents of Thomas ( senior) possible father called William
What happened to Ada? She was not on the 1871 census?
Can anyone help with this please?