Hello Monica/Mark,
The mystery deepens. Just back off
www.scotlandspeople.gov.uk1881 to 1901 there are 12 Henrietta Wilsons marrying in Scotland - none to a Williamson.
The Henrietta Wilson I/we have tracked above marrries on 24 June 1887 at 38 Portessie, Rathven, Banffshire to a David McKeddie a Master Tailor - both are aged 24. At the time she is a domestic servant and a spinster.
Her parents are down as George James Wilson (Ship pilot deceased), and Henrietta Wilson (Miss Munro).
A further check of SP brings up no mariages for a Henrietta McKeddie to a Williamson - checked from 1887 to 2006.
Looks as though you'll have to look elsewhere Mark - what 'facts', in writing do you have about 'your' David Williamson and his marriage.
Hopefully the research we've done here will help someone who is researching this Wilson/Munro/McKeddie family.
Regards, Steve