Thomas Addison

HI, need help!Found death of Thomas Addison in Adelaide St, Wigan .March quarter 1863, 8c 22 ,3 years old..Brother William died same quarter.5 years old.Found Williams birth in 1857.Both died at same address.Cant find birth of Thomas on G.R.O. Their mother was Jane Leyland or Layland who married Thomas Addison 6th April 1857.Could use help!

Name: Thomas Addison
Birth Date: 18 Dec 1862
Baptism Date: 8 Feb 1863
Baptism Place: Wigan, St Thomas, Lancashire, England
Parish as it Appears: Wigan, St Thomas Father: Thomas Addison
Mother: Jane Addison

i think he was 3 months when he died nt 3 years

although looked at the transcript at i think it says thomas james

or thomas and james Twins maybe

or the child wasnt theirs

They had a son Henry born 1860, and he doesn't appear on the 1871 census , it maybe that a mistake as been made and the fathers name entered in error??? Their next child born 1864 was William Henry, probably named after the two deceased??