I have found a fair bit of information on the Cant family since I posted this message and although I can't be certain that any of the following people are yours, it may be of some help to you.
1782 Tillingham James Cant married Hannah Duck (Daughter of William Duck and Hannah Noaks)
They had a daughter Hannah Cant born 1783 Southminster. Don't know about any other children.
Hannah Cant married George Cant ( no date for the marriage and no parents for George yet, sorry)
George and Hannah had the following offspring all, I believe, in Brightlingsea:
George Cant 1806 Samuel Cant 1810 Hannah Cant 1812 William Cant 1814 James Cant 1816 (no more information on the three younger siblings)
George Cant ( 1806) married Charlotte Frost and had offspring:-
George Shipman Cant - no dates for him Hannah 1835 - Colchester Martha 1843 Harriet J 1846 Esther 1849 Samuel 1849
Samuel Cant ( 1810) married Ann Williams and had offspring:
Samuel 1833 ( died 1833) Ann 1834 Samuel 1836 Ermina 1839 George Grose 1841 Elizabeth 1845 Sarah Ursula 1847 Ursula 1849 Joseph 1849 William 1852
I have no trace of an Eliza Cant at the moment and the only George, in my tree, of the right sort of age to be her father doesn't seem to have had a daughter of that name. Unless of course I have missed her!
I do hope this is helpful. I should very much like to be able to trace the parents of my earliest George Cant - the one who married Hannah Cant. If anything crops up in your research which looks promising, please let me know.