Just did a quick check on the South Indian uncle niece marriages It is found among South Indian Muslims see Genetic Disorders of the Indian Subcontinent ISBN 978 1402012150 Springer It is also found among Indonesian Muslims the nation with world s largest Islamic population I do not believe this means we should insert uncle niece back in somewhere because 4 23 verse indeed forbids it This needs a lot more study Ozziegt the references cited in the article offer abundant specifics and discussions on consanguineous cousin marriages of women in Islam Let me think a bit more on how to best address your applies to both concern