Not a lot to go on
best "match" so far would be a possible in Pontypool ????

First name(s) Arthur D M
Country Wales
Last name Ellis
Volume 11A
Birth registration year 1913
Page 352
Registration quarter 1
Record set England & Wales Births 1837-2006
Mother's maiden name Colman
Category Birth, Marriage, Death & Parish Records
District Pontypool
Subcategory Civil Births
County Monmouthshire
Collections from Great Britain, Wales

or a long way way

First name(s) Mervyn F E
Country England
Last name Ellis
Volume 4A
Birth registration year 1913
Page 1625
Registration quarter 1
Record set England & Wales Births 1837-2006
Mother's maiden name English
Category Birth, Marriage, Death & Parish Records
District Halstead
Subcategory Civil Births
County Essex
Collections from Great Britain, England