There are various trees for this family on Ancestry - George appears to be one of 14 children: Amelia 1806, Richard 1807 (presumably died), Lydia Barbara 1808, Isabella Frances 1810, Augustus 1813, Elizabeth Kay 1815, Rosina Mary 1816, Charlotte Augusta 1817, Edward Ralph 1818, Richard 1820, George 1821 (as noted), Frances Henrietta 1824, Anna Maria 1825, Catherine Harriet 1827.
More details about some of them on the trees.
Annette