Hi Narelle

Before checking I would have put money on Kissack , as this is a Manx name , Kussick or Kilpack are not.
Looked at original written documents on the IGI,
The marriage in Andreas and the baptisms of Evan and John in Jurby are written with old "s" which looks like an L or F.
The baptism in 1841 and Thomas's baptism 17/12/1843 in Braddan is clearly Kissack.
The marriage document shows Hugh and Esther made their mark (Could not R&W), witnesses were John Radcliffe and Thomas Clarke.
The un-named daughter is not listed on the 1851 census , but I cannot find a burial , named or un-named that fits the timing.
David Dwyer