Multiple (in-law) marriages between two families

No	Husband	Dates	Wife	Dates	Marriage Place	Date
Type	Sibling/Cousin/Person		Spouse
1	George, 1st Duke of Clarence	1449-1478	Isabel (née Neville)	1451-1476		1469
s-s	Richard III, King of England	1452-1485	Anne (née Neville)	1456-1485		1472
2	Henry Neville, 5th Earl of Westmorland	1525-1564	Margaret Neville (née Cholmley)			1560
p-s	Henry Neville, 5th Earl of Westmorland [2]	1525-1564	Jane Neville (née Cholmley)	-1558
3	Edward Neville, 15th Baron Bergavenny	1705-1724	Katherine Neville (née Tatton)			1724
c-p	William Neville, 16th Baron Bergavenny	1698-1744	Katherine Neville (née Tatton) [2]			1725
4	David Gordon, 14th Baron of Abergeldie	1753-1831	Anne Gordon (née Biddulph)	-1841		1789
s-s	Adam Gordon	1758-1800	Penelope Gordon (née Biddulph)
5	Michael Francis Gordon, 15th Baron of Abergeldie	1792-1860	Caroline Gordon (née Swete)			1820
s-s	Adam Gordon	1801-1839	Susan Gordon (née Swete)	-1861		1825
s-s	Mary Anne Swete (née Gordon)	-1859	Rev. William Swete			1824
6	Hugh Mackay Gordon, 17th Baron of Abergeldie	1826-1901	Susan Amelia Gordon (née Sams)	-1910		1859
s-s	James Henry Gordon	1839-1920	Arabella Hewit Gordon (née Sams)	-1919		1869
7	Douglas Charles Abercromby	1860-1915	Helen Louisa Hodgson Abercromby (née Murray)	-1933		1886
s-s	Grace Amelia Murray (née Abercromby)	-1932	Keith William Murray	-1922		1887
8	Charles Austen Field-Marsham	-1941	Joan Helen Field-Marsham (née Neville)	1906-1988		1935
s-p	Robert Edward Field-Marsham	-1996	Joan Helen Field-Marsham (née Neville) [2]	1906-1988		1950

The table records where two siblings, half-siblings or cousins have married siblings or cousins in a second family. It also records cases where one person has married two siblings or cousins.
s-s stands for sibling-sibling,
s-c for sibling-cousin,
p-s for same person-sibling,
p-c for same person-cousin,
s-h for sibling-half sibling, etc.