The Purum are an "old Kuki" tribe of Manipur. They are (were) notable because their marriage system is the subject of ongoing statistical and ethographical analysis; Buchler states that "they are perhaps the most over-analyzed society in anthropology". Purum marry only in selected sibs; the allowed sibs are fixed by traditional customs. According to the 1931 Census of India, the Purums numbered 145 men and 158 women, all practising their ancestral tribal religion; in 1936 they numbered 303 individuals but in the 1951 census they numbered only 43 individuals.