Here’s a death of an Andrew Donaldson who was roughly of the right age. Don’t know if it’s your family though but the general area is right.
Informant was daughter Mary Jane Mitchell of Creggan Rd. Looked for her marriage but couldn’t find it.
Knowhead Presbyterian has baptism records from 1826 and marriages from 1846. Copy in PRONI in Belfast.
I looked for Samuel Donaldson & family in the 1831 census but did not find him in Co. Derry. There was a Samuel in Drumachose but he appears to have been living with a servant only. No wife and children. If he had a servant, he’d likely have been a farmer, not a weaver.
Here’s a Samuel Donaldson, son of William Donaldson, farming in Eskaheen in 1901:
His marriage to Matilda Wilson. His previous wife had died.
Same family in 1911:
Samuel’s first wife looks to have been Jane Jack. Birth of their daughter Elizabeth here:
Jane’s death in Feb 1894. (He didn’t hang about as his remarriage to Matilda was on 2nd April 1894).
Samuel’s previous marriage:
You will see he was a widower at that marriage too. Can’t find his previous marriage.
Administration with Will Annexed of the estate of the late Samuel Donadson, Iskaheen, Muff, Co. Donegal, Farmer, who died 31 January 1920, granted at Londonderry 9 June 1920 to Elizabeth Dickson, Married Woman, the daughter. Effects: £340 2s 7d.
The above will should be in PRONI. They will copy it for you for a fee.
Daughter Elizabeth’s marriage in 1911: