You're Linda's cousin

I remember her always saying that all (or nearly all

) McGoogans from Edinburgh area were connected...which is what made me think of her!
Re Isabella Lillian, have you found her on any census apart from 1891? I am guessing her life is also a bit complicated perhaps?
Regarding the parents' names she gave or were given for her at death, all a bit confusing isn't

She could have been illegitimate perhaps.... Entries such as this perhaps for births:
Isabella DONALDSON b. 21 Sept. 1862 in Torthorwald, Dumfries. Mother Catherine DONALDSON
Where did Isabella Lilly die? Was it in Ireland or Scotland?
With daughter Sarah showing an Irish address, any luck following through on that?
Monica