Hannah Wonacott married Stephen Burridge 24 Mar 1821 at Lamerton.
You will find the name also as Wonacot, Wonnacott and Wonnaket (probably amongst others)
If say that Hannah was born about 1796. As she was married in Lamerton there is another marriage in Lamerton which may be appropriate.
William Wonnacott married Elizabeth Blatchford 23 Feb 1793 in Lamerton. There is a note on the 1793 marriage (perhaps details of martital status, maybe a widow, or home Parish, maybe Lamerton was the brides Parish) if you contact the OPC they may be able to give you this information.
I can only see two Wonnacot baptism in Lamerton;
Mary in May 1794 (buried Jun 1794) & Mary Ann in May 1795 d's of William and Elizabeth. W or E were not buried Lamerton. Perhaps William and Elizabeth moves to Lifton?
Incidentally there is only one other Wonnacott burial in Lamerton. Judith Wonnacott aged 76 (born 1762) buried 30 May 1838 in Lamerton. Note: Tavistock.
I assume this means Judith was living in Tavistock but buried in Lamerton.
Hope this helps