Deletion of Endogamy in the Spanish monarchy

Comment: Historically inaccurate, as mentioned by Agricolae above.  Further, it is not an article in the style of Endogamy in the British monarchy but is a piece of  SYN|original synthesis in list format.  I am skeptical that such topics are appropriate for WP articles; a great deal of original synthesis is needed, and sources directly discussing the articles' subjects are rare
Stance: delete
Cited policy: Wikipedia:No original research (WP:ORIGINAL)