I hope you dont mind but I think you mentioned Ellen Devlin, b Hebburn.
If she is the person concerned, her siblings were also born in England -the older ones Hebburn.
1911 indexes show her father was born County Tyrone and her mother in Monaghan.
It may be, of course, that you are searching two grandmothers, in which case ignore the above.

If you need further information, please post as people are very happy to help.