I am searching for the Date of Birth and Parents of two Margaret Corkill.

1 - Margaret Corkill - married 1812 - William Crellin at Marown
2 - Margaret Corkill - married 1815 - James Killip at Kirk German

William son of William & Margaret Crellin married Elinor daughter of James & Margaret Killip in 1837 at Kirk German.

Any information would be greatly appreciated.
Thank you.