Roedd y Parch. William Roberts, Amlwch (1784-1864) yn un o golofnau cedyrn yr achos Methodistaidd yn Llanfaethlu ac un o brif leygwyr Cyfarfod Misol Môn.
William Roberts was born in the parish of Llaneilian, Anglesey in 1784. At the age of ten he was working at the Parys Copper Mine but later became a husbandman and candle maker. He received no education when he was young, but later attended the school at Amlwch port for a period of three months. At the age of 21 he was made a deacon and at 23 he began to preach and eventually became a Calvinist Methodist minister. He married Sarah Jones in 1864 and they had 7 children. He died at the age 80 in 1864. For further biographical details, consult his biography, Cofiant y Parch. W. Roberts, Amlwch by Rev. H. Jones, Amlwch (1869).