Just posting incase relevant..
1921 for Aunt had pob as Arthog, Merionethshire. Looked it up as had not heard of it, came across this census
1891 -
https://www.ancestry.co.uk/search/collections/6897/records/5692551891 - Ynyscynhaiarn, Portmadoc, Caernarvonshire
William Jones 65 Head Denbighshire
Elizabeth Jones 55 Wife, Merionethshire
Elizabeth M Jones 14 Daughter Arthog, Merionethshire Catherine A Jones 12 Daughter, ArthogThomas Jones 67 Father-in-law, Caernarvonshire
I know age is out for Elizabeth Mary, but husband in 1921 was younger. She may have shaved a few years.
1881 - Dolgelley, Merionethshire
William Jones 65 Head Denbighshire
Elizabeth Jones 45 Wife, Merionethshire
Eliza M. Jones 4 Daughter "
Catherine A. Jones 2 Daughter "
Likely birth reg under Dolgelley for both girls with mmn Jones. Which would fit the birth months + 11 for Elizabeth from 1921 (but there are many Jones)
JONES, ELIZABETH MARY mmn JONES
GRO Reference: 1876 S Quarter in DOLGELLEY Volume 11B Page 427
JONES, CATHERINE ANN mmn JONES
GRO Reference: 1878 S Quarter in DOLGELLEY Volume 11B Page 431
Just a few thoughts
Cas