Jane Murray from Ballygowan

I have recently learned that my gg-grandmother, Jane Murray, may have come from Ballygowan, Co. Down.  I don't know for sure what civil parish she was born in, as I understand Ballygowan could also be in Comber.  I will post this message there too.

What I know is that Jane was born around 1815 to Edward Murray and Margaret (unsure of maiden name).  It seems she married a Murray as well (John) who may have been from the same area.  His parents were John Murray and Nancy (maiden name unknown).  They most likely married in Co. Down and then left around 1850 and settled in Norristown, PA for about 10 years (where they had 2 children--Anna and Edward.  Then they moved to Highland Township, Wabasha, MN.  They eventually ended up in Collis, Traverse County, MN and died there.  John in 1885 and Jane in 1895.

I'd like to be able to confirm Jane (and John's) birth places.  For sure they were both born in Co. Down.

Colleen