There are four entries for jane's death in 1911 on SP.
Jane Drummond Blair
Jane Drummond Taylor
Jane D Schawbe
Jane D Norvall
The original can be viewed on a tree on Ancestry and confirms parents as Henry Schawbe, ship owner (deceased) and Jane Norvall, Housekeeper, subsequently married to Gordon Blair, Law Clerk. Informant was her husband Charles Taylor.
From the wording of the parental info on both marriage and death certificates it would seem that Jane was illegitimate.
There were several Schwabe families in Glasgow in the 1850's but there is only one Schawbe ref on SP other than two entries (marriage and death) pertaining to Jane Drummond Schawbe. The other ref is for Ludolp Schawbe in the 1855 valuation roll but he appears as Schwabe in 1851 census.
There is a Henry Schwabe who marries in Liverpool in 1851, who is described variously as a merchant and ship owner. He went bankrupt in 1857 and died in Scarborough in 1861, his wife having predeceased him in 1857.
Isobel