do you have a baptismal date for Henry ? Taubmans born in Rushen (as per his 1851 census entry) are unknown at that period.
What justification do you have for Mary Moor being mother especially as her will is 1755 and is buried Malew 17541130.
Possibly you meant Margaret Moore whose will does indeed mention a son Henry - I would be interested in any lineage of either John or Margt