Hi Adrienne

I have done a little research through MNB & the wills index where there are a number of Crellin wills transcribed.
I also have Jane's death in 1806 but I don't know if this is correct.

Her possible parents are Matthew Crellin 1718 - 1792, son of Patrick (died 1755) & Catherine Cross (died 1738)
and
Jane Harrison daughter of Jane Harrison als Quayle als Brew (died 1744), & William Harrison (Cordamon) (died 1734)

MC summary on MNB for Matthew Crellin (Bearie) & Jane Harrison (Malew)
German NSS Oct 1740 12

Both Matthew (1792) & Jane (1786) wills are transcribed, but they both have daughter Jane married to a Thomas Kelly
Marriage German 27/11/1781
Matthew mentions G'son John Kelly
Matthew had 5 deaf & dumb children, plus son John & daughter Christian

I have links thro parents or siblings to Catherine Cross, Jane Harrison & John Crellin (thro wife Anne Quirk, who later married Ahab Sayle)

I don't know if this helps, or if it's the correct Jane or as I have not checked in person correct
Also in 1792 Christian Crellin died ?sister of Jane , who married James Crellin in 1786, a widower from Patrick

I totally agree MNB a great resource to start from esp on a wet Sunday afternoon

Good luck Karen