Hi Jackie,
Found a Mary Ann Lloyd on the 1901 census, born about 1900 in Chirk, father was Joseph Lloyd, miner.
Here are the details as it seems a match apart from her middle name!
Living at Bryn ap oes, Chirk.
Joseph Head married aged 27, underground coal hewer, born Acrefair
Mary Wife married aged 28, born Rhos
Joseph Son aged 9, born Rhos
Frank Son aged 3, born Poncysllte or Froncysllte?
Mary Ann daughter aged 9 months born Chirk
Ref RG13 piece 2546 folio 146 page 1
Regards
Trish