Hi ,
If he died in Scotland have you looked at his death certificate ?
That should name his parents if known to the informant.
Was he in Milton of Connon , Carmyllie , Angus in 1891 ? (occupation miller)
There is a death on Scotlandspeople for a George Hendry 1898 Carmyllie Angus , born c1827.
Also a death for an Isabella Hendry(other surname Carstairs) Carmyllie Angus 1893, born c1826
ev
Added -
George Hendry buried 21st Oct. 1898 Carmyllie Churchyard(Angus)
George Hendry(wife of) buried 14th Oct. 1893 Carmyllie Churchyard(Angus)
http://www.deceasedonline.com/