There is a Rowington Historical Society that is very good and very helpful
I have a John Avern b 1710 Marrying Elizabeth Wallis b 1709
then there is John Wallis b 10/11/1696-20/3/1765 marries Catherine Avern on 3/12/1717 she was born b22/5/1694
there Children were
John 29/11/1720-3/1/1803 he marries Ann? 1743- 1828
there son is Stephen.16/5/1766-1849 who marries Mary Osbourne 1769-1832.
Back to Catherine 1964 her parents were Clement Avern bB1666-1703 and Katherine Satchwell b1653-1710
Hope this is of help.