They tend to be endogamous, and tend not to intermarry even with other Christian groupings. Sub-castes do intermarry, and have a hierarchy among themselves. Several sects refuse to intermarry with each other. Scandinavian royalty would intermarry with Russian princes and princesses. The Huguenots soon began to intermarry with the English colonists. The Tatars were allowed to intermarry with Christians,a practice uncommon in Europe at the time. Some racial groups are more likely to intermarry than others. It is generally believed that the Ptolemies did not intermarry with native Egyptians. They also did not intermarry with the newcomers, isolating themselves. Except in Poona district, persons with the same surname cannot intermarry. Recently converted families who continued to intermarry were especially viewed with suspicion. The Cheyenne began to intermarry with the Lakota in that territory. Despite their different lifestyles, both these groups intermarry. Nonetheless, these two groups do not intermarry. The Banyala do not intermarry with someone from the same clan.