Hi Margaret

Having moved this to Completed as we agreed, I read the thread from the start!
Have you considered that she may have been called Ivy but not registered as Ivy?
I found a death in 1990 (Oct Q) of a Mary Elizabeth Howells in Pontypridd district, age 83
Her birth date is given as 10th June 1907
Pontypridd volume 27 page 1429
There is a possible marriage in 1938, of Mary E Matthews and Lewis E Howells
Pontypridd volume 11a page 1099
and there is a death of Lewis E Howells in 1954, age 53
Pontypridd volume 8b page 509
Kind Regards
Morgan