There were only two who were registered (birth) as Ethel D OWENS from 1870-1900
Births Sep 1888
OWENS Ethel Daisy Richmond, S 2a 374
Births Jun 1895
OWENS Ethel Diana Hereford 6a 490
so one of them was a Daisy. Of course, this one was born near London and "your" marriage was in Birmingham.
I think the Hereford EDO may have married in Pontypridd in 1915.