Partially based on this connection , however , the church of Merthyr Dyfan dates his martyrdom to c. 180 .
The discovery of Williams 's alterations and forgeries have since discredited this connection .
Partially based on this connection , however , the church of Merthyr Dyfan dates Williams ' martyrdom to c. 180 .
The discovery of Williams 's alterations and forgeries have since discredited this connection .