I think this is the family in the 1841 census you cited.
John Henry & Margaret Skillicorn md 23 JUL 1825 Lonan, Isle Of Man
John Henry ch 19 MAR 1826 Lonan, Isle Of Man
Margaret Henry buried 21 Jan 1827 Lonan, Isle of Man
John Henry & Ann Kelly md 26 JAN 1828 Lonan, Isle Of Man
William ch 17 JAN 1830 Lonan, Isle Of Man
John Henry age 34 yrs buried 12 Aug 1836 Lonan, Isle of Man

info from IGI and Lonan Burial Record