Have just seen this thread. I have no direct connection to this family but do run the Daglish One-Name Study which studies the name.
I have William Daglish's parents as another William Daglish and Dorothy Gee, married 28 May 1785 in Gateshead. William married Isabella White on 1 July 1820 in Alston, Cumberland.
Would be interested to compare notes. You can contact me at email@example.com
With best wishes,
Daglish One-Name Studywww.one-name.org/profiles/daglish.html