First of all a warm welcome to Rootschat Georgie.
Evelyn Ann Evans's Birth is recorded in the Crickhowell District of Breconshire in the Jan/Feb/Mar quarter,Volume 11b,Page 100.
Crickhowell District at that time included Llanelly and I found living there in the 1901 Census this family;
Arthur Evans,born c 1870,Hereford Herefordshire,Coal Miner.
Charlotte Evans,born c 1871,Hereford.
George Evans,born c 1893,Hereford.
Mary Ellen Evans,born c 1895 Hereford.
Arthur Charles Evans,born c 1896,Hereford.
Gladys May Evans,born c 1899 Llanelly Breconshire.
RG13/5173/40/3.
I also found this marriage in Hereford in the Jan/Feb/Mar quarter of 1892 between an Arthur Evans and a Charlotte Williams,Volume 6a,Page 698.
Regards
William Russell Jones