Hi - I think it could be the other way around, and the 'Margery' was an error, seeing that she married as 'Margaret' Loony. I very much doubt that she had her first child, then all the others, starting at aged over 46 - one or two might have been OK!

I think you will need wills to sort out the families.

These are the children's bapts on the register, from two or three William Looneys:
William William Looney/Margery 25 Feb 1732/33
John William Looney/Marjory 28 Jan 1735/36
Peter William Looney/Margaret 12 Feb 1735/36
John William Looney/Margaret 1 May 1738
James William Looney/Marjory 18 Nov 1739
Margaret William Looney/Margaret 10 Aug 1740
Isabel William Loony/Margaret 2 Oct 1743
Easter William Loony/Margery 11 Dec 1744

Children of William Looney and Margaret Corkill:
Daniel illeg. son of William Looney/Margaret Corkill 24 Mar 1734/35
Joney William Looney/Margaret Corkill 20 Apr 1746

Margt LOONEY buried Jun 8 1788
Margaret LOONEY buried Dec 23 1784
Margt LOONEY buried Aug 13 1794 smallpox
Margt LOONEY buried Jun 4 1795
Margaret LOONEY buried Jan 31 1815

No Margery.

Sue