Glad to have helped! I hope you feel better soon

I don’t know why they changed their surnames either, this family certainly made a habit of it. Adam & Ann don’t seem to have anymore children under that alias, and I can’t find any matching death records. But then again I still haven’t checked marriages.
Strangely enough Joseph Conroy (my great x3 grandfather through his eldest dau Ellen Rooney) doesn’t seem to have gone by an alias after his marriage to Mary Ann. All his children & censuses were registered under Conroy, which has made them easier to trace. Mary Ann Allen‘s grandfather was also a hawker; John Allen from Longframlington.
Regarding Margaret Conroy, I don’t directly know who she is but I think I do remember one somewhere. I’ll have a look.
Edit: Adam might’ve had the alias Allan as it seems his mother maiden name was that (too many Allan’s!

)
Adam Drummond bap 3 Oct 1836 Earsdon, son of Andrew Drummond basket maker and Mary
Then on familysearch is his sisters baptism:
Eve Drummond bap 2 Feb 1839 Earsdon, dau of Andrew Drummond and Mary Allen
DRUMMOND FEMALE
Tynemouth Dec 1838
25 377
1861 Census, Whitley, Tynemouth
Andrew Drummond, 51, born Scotland or Northumberland, cooper
Mary Drummond, 57, hawker
Robert Drummond, son, 30, carter, unm
Andrew Drummond, son, 21, general labourer, married
Ann Drummond, dau in law, 19, married
Ann Drummond, dau, 15
Jane Drummond, dau, 11
DRUMMOND, ANN ALLEN
GRO Reference: 1845 S Quarter in ROTHBURY UNION Volume 25 Page 377
DRUMMOND, JANE ALLAN
GRO Reference: 1850 J Quarter in TYNEMOUTH UNION Volume 25 Page 505
DRUMMOND, THOMAS ALLAN
GRO Reference: 1844 M Quarter in BERWICK UPON TWEED UNION Volume 25 Page 28 (??)