Looking for Alexander of Kincardineshire Scotland

Hi There! I'm looking for the descendants of Thomas Alexander (born 1771) and Elizabeth Milne (born 1781). Thomas & Elizabeth had the following children; Jane or Jean Alexander (born 1802), Rebecca Alexander (born 1805), Elizabeth Alexander (born 1807) married Alexander Walker, Thomas Alexander (born 1809), Mary Alexander (born 1814), William Alexander (born 1816), James Alexander (born 1818), Alexander Alexander (born 1820).