There's a Tilly Evans on the '1901 Census, born "Ponty dulais" with Daniel and Catherine.
FindMyPast Baptism (image)
Oct 10 1893, Matilda, dau of Daniel and Catherine Evans, abode Lliw Common, Parish of Llandilo Talybont, father's occpn. Tinman
Possible GRO?
Matilda Evans, Dec Qtr 1893, Swansea, vol 11a page 654 - mother's maiden name Bass