I've just started researching my family tree, and have got back as far as the Dodd family from Broughton/ Brymbo on my Grandmothers side.
My Grandmother, Ella Griffiths' mother was Mary Jane Griffiths, nee Dodd. Mary's parents were Joseph Dodd (born 1836) and Joanna Dodd, nee Dodd (born 1843).
On the 1881 census the family is shown as living in Long Row, Brymbo.
If I understand correctly Sarah Dodd was born c1830, so would put her quite close, agewise, to Joseph Dodd.
Can you find any connection here?
Jeremy