Third cousin once removed dating
Only Austria, Hungary, and Spain banned cousin marriage throughout the 19th century, with dispensations being available from the government in the last two countries.The 19th-century academic debate on cousin marriage developed differently in Europe and America.Anthropologist Jack Goody said that cousin marriage was a typical pattern in Rome, based on the marriage of four children of Emperor Constantine to their first cousins and on writings by Plutarch and Livy indicating the proscription of cousin marriage in the early Republic.
It began to fall out of favor in the 19th century as women became socially mobile.
Children of first-cousin marriages may have an increased risk of genetic disorders, particularly if their parents both carry a harmful recessive mutation, but this can only be estimated empirically, and those estimates are likely to be specific to particular populations in specific environments.
Children of more distantly related cousins have less risk of genetic disorders.
people with common grandparents or people who share other fairly recent ancestors).
Opinions and practice vary widely across the world.