A lot of trees have her as the daughter of William and Elizabeth Pashler, but no baptism date.
They list ten siblings.
1841 Census - Abbotsley, St Neots, Huntingdonshire & Cambridgeshire
William Tossill Male 50 1791 Ag. Lab.
Elizabeth Tossill Female 50 1791 Huntingdonshire
Christiana Tossill Female 15 1826 Huntingdonshire
Rachel Tossill Female 15 1826 Huntingdonshire
Joseph Tossill Male 10 1831 Huntingdonshire
Robert Enderby Male 50 1791 Huntingdonshire
William, b 1786, may be in Tetworth in 1851, born in Croyton (Croydon?) Cambs, next door to his son William, born 1822 in Abbotsley.
P.S. William may be duplicated in 1851:
William Tossel Head Married Male 66 1785 Lab Croydon, Cambridgeshire
Betsey Tossel Wife Married Female 67 1784 Wife Abbotsley, Huntingdonshire
Joseph Tossel Son Unmarried Male 22 1829 Lab Abbotsley, Huntingdonshire